61838934156 has 18 divisors (see below), whose sum is σ = 156315083652. Its totient is φ = 20612978040.

The previous prime is 61838934109. The next prime is 61838934161. The reversal of 61838934156 is 65143983816.

61838934156 is a `hidden beast` number, since 61 + 83 + 8 + 93 + 415 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 858874050 + ... + 858874121.

It is an arithmetic number, because the mean of its divisors is an integer number (8684171314).

Almost surely, 2^61838934156 is an apocalyptic number.

It is an amenable number.

61838934156 is an abundant number, since it is smaller than the sum of its proper divisors (94476149496).

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

61838934156 is a wasteful number, since it uses less digits than its factorization.

61838934156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717748181 (or 1717748176 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 61838934156 in words is "sixty-one billion, eight hundred thirty-eight million, nine hundred thirty-four thousand, one hundred fifty-six".