61404644061 has 12 divisors (see below), whose sum is σ = 90198912960. Its totient is φ = 40242591240.

The previous prime is 61404644033. The next prime is 61404644089. The reversal of 61404644061 is 16044640416.

61404644061 is a `hidden beast` number, since 6 + 1 + 4 + 0 + 4 + 644 + 0 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (61404644033) and next prime (61404644089).

It is not a de Polignac number, because 61404644061 - 2⁵ = 61404644029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61404644261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57819285 + ... + 57820346.

It is an arithmetic number, because the mean of its divisors is an integer number (7516576080).

Almost surely, 2^61404644061 is an apocalyptic number.

It is an amenable number.

61404644061 is a deficient number, since it is larger than the sum of its proper divisors (28794268899).

61404644061 is a wasteful number, since it uses less digits than its factorization.

61404644061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115639696 (or 115639693 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 61404644061 in words is "sixty-one billion, four hundred four million, six hundred forty-four thousand, sixty-one".