53698459521 has 48 divisors (see below), whose sum is σ = 88351896960. Its totient is φ = 28825735680.

The previous prime is 53698459519. The next prime is 53698459531. The reversal of 53698459521 is 12595489635.

It is a happy number.

It is not a de Polignac number, because 53698459521 - 2¹ = 53698459519 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (53698459511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1332100 + ... + 1371818.

It is an arithmetic number, because the mean of its divisors is an integer number (1840664520).

Almost surely, 2^53698459521 is an apocalyptic number.

53698459521 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

53698459521 is a deficient number, since it is larger than the sum of its proper divisors (34653437439).

53698459521 is a wasteful number, since it uses less digits than its factorization.

53698459521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40294 (or 40287 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 57.

The spelling of 53698459521 in words is "fifty-three billion, six hundred ninety-eight million, four hundred fifty-nine thousand, five hundred twenty-one".