61873918690 has 16 divisors (see below), whose sum is σ = 112223232000. Its totient is φ = 24560638960.

The previous prime is 61873918681. The next prime is 61873918697. The reversal of 61873918690 is 9681937816.

It is a super-2 number, since 2×61873918690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61873918697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23614690 + ... + 23617309.

It is an arithmetic number, because the mean of its divisors is an integer number (7013952000).

Almost surely, 2^61873918690 is an apocalyptic number.

61873918690 is a deficient number, since it is larger than the sum of its proper divisors (50349313310).

61873918690 is a wasteful number, since it uses less digits than its factorization.

61873918690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47232137.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 61873918690 in words is "sixty-one billion, eight hundred seventy-three million, nine hundred eighteen thousand, six hundred ninety".