61974360036 has 120 divisors (see below), whose sum is σ = 164085989760. Its totient is φ = 20394557568.

The previous prime is 61974360017. The next prime is 61974360053. The reversal of 61974360036 is 63006347916.

61974360036 is a `hidden beast` number, since 6 + 1 + 9 + 7 + 4 + 3 + 600 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 61974359973 and 61974360000.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25576321 + ... + 25578743.

It is an arithmetic number, because the mean of its divisors is an integer number (1367383248).

Almost surely, 2^61974360036 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 61974360036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82042994880).

61974360036 is an abundant number, since it is smaller than the sum of its proper divisors (102111629724).

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

61974360036 is a wasteful number, since it uses less digits than its factorization.

61974360036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415 (or 3404 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 61974360036 in words is "sixty-one billion, nine hundred seventy-four million, three hundred sixty thousand, thirty-six".