61620535152 has 120 divisors (see below), whose sum is σ = 192132345600. Its totient is φ = 18275571840.

The previous prime is 61620535133. The next prime is 61620535157. The reversal of 61620535152 is 25153502616.

61620535152 is a `hidden beast` number, since 61 + 62 + 0 + 535 + 1 + 5 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620535157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339402 + ... + 488297.

It is an arithmetic number, because the mean of its divisors is an integer number (1601102880).

Almost surely, 2^61620535152 is an apocalyptic number.

It is an amenable number.

61620535152 is an abundant number, since it is smaller than the sum of its proper divisors (130511810448).

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

61620535152 is a wasteful number, since it uses less digits than its factorization.

61620535152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827771 (or 827762 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 61620535152 in words is "sixty-one billion, six hundred twenty million, five hundred thirty-five thousand, one hundred fifty-two".