53212644540 has 72 divisors (see below), whose sum is σ = 176085484848. Its totient is φ = 12900034560.

The previous prime is 53212644487. The next prime is 53212644547. The reversal of 53212644540 is 4544621235.

53212644540 is a `hidden beast` number, since 5 + 3 + 2 + 1 + 2 + 644 + 5 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53212644495 and 53212644504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53212644547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13435557 + ... + 13439516.

It is an arithmetic number, because the mean of its divisors is an integer number (2445631734).

Almost surely, 2^53212644540 is an apocalyptic number.

It is an amenable number.

53212644540 is an abundant number, since it is smaller than the sum of its proper divisors (122872840308).

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

53212644540 is a wasteful number, since it uses less digits than its factorization.

53212644540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26875099 (or 26875094 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 53212644540 in words is "fifty-three billion, two hundred twelve million, six hundred forty-four thousand, five hundred forty".