61982057956 has 24 divisors (see below), whose sum is σ = 133499817920. Its totient is φ = 24520374432.

The previous prime is 61982057933. The next prime is 61982057993. The reversal of 61982057956 is 65975028916.

It is a self number, because there is not a number n which added to its sum of digits gives 61982057956.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85139826 + ... + 85140553.

Almost surely, 2^61982057956 is an apocalyptic number.

It is an amenable number.

61982057956 is an abundant number, since it is smaller than the sum of its proper divisors (71517759964).

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

61982057956 is a wasteful number, since it uses less digits than its factorization.

61982057956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170280403 (or 170280401 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 58.

It can be divided in two parts, 619820 and 57956, that added together give a palindrome (677776).

The spelling of 61982057956 in words is "sixty-one billion, nine hundred eighty-two million, fifty-seven thousand, nine hundred fifty-six".