21610612162552 has 32 divisors (see below), whose sum is σ = 46308613511520. Its totient is φ = 9261659151360.

The previous prime is 21610612162459. The next prime is 21610612162553. The reversal of 21610612162552 is 25526121601612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21610612162553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23816128 + ... + 24706864.

It is an arithmetic number, because the mean of its divisors is an integer number (1447144172235).

Almost surely, 2^{21610612162552} is an apocalyptic number.

It is an amenable number.

21610612162552 is an abundant number, since it is smaller than the sum of its proper divisors (24698001348968).

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

21610612162552 is a wasteful number, since it uses less digits than its factorization.

21610612162552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323991 (or 1323987 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 21610612162552 in words is "twenty-one trillion, six hundred ten billion, six hundred twelve million, one hundred sixty-two thousand, five hundred fifty-two".