61617644523624 has 128 divisors (see below), whose sum is σ = 185319604224000. Its totient is φ = 16678155965184.

The previous prime is 61617644523619. The next prime is 61617644523649. The reversal of 61617644523624 is 42632544671616.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216700057 + ... + 216984215.

It is an arithmetic number, because the mean of its divisors is an integer number (1447809408000).

Almost surely, 2^{61617644523624} is an apocalyptic number.

It is an amenable number.

61617644523624 is an abundant number, since it is smaller than the sum of its proper divisors (123701959700376).

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

61617644523624 is a wasteful number, since it uses less digits than its factorization.

61617644523624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352127 (or 352123 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 57.

The spelling of 61617644523624 in words is "sixty-one trillion, six hundred seventeen billion, six hundred forty-four million, five hundred twenty-three thousand, six hundred twenty-four".