61812597756 has 96 divisors (see below), whose sum is σ = 177825776128. Its totient is φ = 16273509120.

The previous prime is 61812597689. The next prime is 61812597809. The reversal of 61812597756 is 65779521816.

It is a junction number, because it is equal to n+sod(n) for n = 61812597696 and 61812597705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573966 + ... + 673098.

Almost surely, 2^61812597756 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 61812597756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88912888064).

61812597756 is an abundant number, since it is smaller than the sum of its proper divisors (116013178372).

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

61812597756 is a wasteful number, since it uses less digits than its factorization.

61812597756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99731 (or 99729 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 57.

The spelling of 61812597756 in words is "sixty-one billion, eight hundred twelve million, five hundred ninety-seven thousand, seven hundred fifty-six".