61497632256 has 80 divisors (see below), whose sum is σ = 164224416048. Its totient is φ = 20450304000.

The previous prime is 61497632221. The next prime is 61497632269. The reversal of 61497632256 is 65223679416.

It is a junction number, because it is equal to n+sod(n) for n = 61497632199 and 61497632208.

It is a congruent number.

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, 599106 + ... + 694206.

Almost surely, 2^61497632256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61497632256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82112208024).

61497632256 is an abundant number, since it is smaller than the sum of its proper divisors (102726783792).

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

61497632256 is an equidigital number, since it uses as much as digits as its factorization.

61497632256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95543 (or 95527 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The spelling of 61497632256 in words is "sixty-one billion, four hundred ninety-seven million, six hundred thirty-two thousand, two hundred fifty-six".