61031169936 has 120 divisors (see below), whose sum is σ = 186401569536. Its totient is φ = 18487192320.

The previous prime is 61031169907. The next prime is 61031169949. The reversal of 61031169936 is 63996113016.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61031169891 and 61031169900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5337121 + ... + 5348543.

Almost surely, 2^61031169936 is an apocalyptic number.

61031169936 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61031169936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93200784768).

61031169936 is an abundant number, since it is smaller than the sum of its proper divisors (125370399600).

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

61031169936 is a wasteful number, since it uses less digits than its factorization.

61031169936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14821 (or 14812 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 61031169936 in words is "sixty-one billion, thirty-one million, one hundred sixty-nine thousand, nine hundred thirty-six".