1957191144 has 32 divisors (see below), whose sum is σ = 4910658720. Its totient is φ = 650039616.

The previous prime is 1957191143. The next prime is 1957191199. The reversal of 1957191144 is 4411917591.

It is a junction number, because it is equal to n+sod(n) for n = 1957191096 and 1957191105.

It is not an unprimeable number, because it can be changed into a prime (1957191143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140554 + ... + 153849.

It is an arithmetic number, because the mean of its divisors is an integer number (153458085).

Almost surely, 2^1957191144 is an apocalyptic number.

It is an amenable number.

1957191144 is an abundant number, since it is smaller than the sum of its proper divisors (2953467576).

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

1957191144 is a wasteful number, since it uses less digits than its factorization.

1957191144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294689 (or 294685 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 1957191144 is about 44240.1530738762. The cubic root of 1957191144 is about 1250.8668427813.

The spelling of 1957191144 in words is "one billion, nine hundred fifty-seven million, one hundred ninety-one thousand, one hundred forty-four".