63854939534 has 4 divisors (see below), whose sum is σ = 95782409304. Its totient is φ = 31927469766.

The previous prime is 63854939531. The next prime is 63854939563. The reversal of 63854939534 is 43593945836.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×63854939534² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63854939531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15963734882 + ... + 15963734885.

It is an arithmetic number, because the mean of its divisors is an integer number (23945602326).

Almost surely, 2^63854939534 is an apocalyptic number.

63854939534 is a deficient number, since it is larger than the sum of its proper divisors (31927469770).

63854939534 is a wasteful number, since it uses less digits than its factorization.

63854939534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31927469769.

The product of its digits is 41990400, while the sum is 59.

The spelling of 63854939534 in words is "sixty-three billion, eight hundred fifty-four million, nine hundred thirty-nine thousand, five hundred thirty-four".