1955818536 has 96 divisors (see below), whose sum is σ = 5820265440. Its totient is φ = 545795712.

The previous prime is 1955818519. The next prime is 1955818549. The reversal of 1955818536 is 6358185591.

It is a happy number.

It is a super-2 number, since 2×1955818536² = 7650452291522366592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31230 + ... + 69906.

It is an arithmetic number, because the mean of its divisors is an integer number (60627765).

Almost surely, 2^1955818536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955818536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910132720).

1955818536 is an abundant number, since it is smaller than the sum of its proper divisors (3864446904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1955818536 is a wasteful number, since it uses less digits than its factorization.

1955818536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38743 (or 38732 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 51.

The square root of 1955818536 is about 44224.6372059738. The cubic root of 1955818536 is about 1250.5743570641.

The spelling of 1955818536 in words is "one billion, nine hundred fifty-five million, eight hundred eighteen thousand, five hundred thirty-six".