53649980864 has 28 divisors (see below), whose sum is σ = 109895932608. Its totient is φ = 25959667200.

The previous prime is 53649980809. The next prime is 53649980869. The reversal of 53649980864 is 46808994635.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 53649980797 and 53649980806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53649980869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13518677 + ... + 13522644.

It is an arithmetic number, because the mean of its divisors is an integer number (3924854736).

Almost surely, 2^53649980864 is an apocalyptic number.

It is an amenable number.

53649980864 is an abundant number, since it is smaller than the sum of its proper divisors (56245951744).

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

53649980864 is a wasteful number, since it uses less digits than its factorization.

53649980864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27041364 (or 27041354 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 62.

The spelling of 53649980864 in words is "fifty-three billion, six hundred forty-nine million, nine hundred eighty thousand, eight hundred sixty-four".