61242220008931 has 16 divisors (see below), whose sum is σ = 66407918673600. Its totient is φ = 56142097377408.

The previous prime is 61242220008923. The next prime is 61242220009013. The reversal of 61242220008931 is 13980002224216.

It is a cyclic number.

It is not a de Polignac number, because 61242220008931 - 2³ = 61242220008923 is a prime.

It is a super-2 number, since 2×61242220008931² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61242220008901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10310676 + ... + 15125953.

It is an arithmetic number, because the mean of its divisors is an integer number (4150494917100).

Almost surely, 2^{61242220008931} is an apocalyptic number.

61242220008931 is a deficient number, since it is larger than the sum of its proper divisors (5165698664669).

61242220008931 is a wasteful number, since it uses less digits than its factorization.

61242220008931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25437918.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 61242220008931 in words is "sixty-one trillion, two hundred forty-two billion, two hundred twenty million, eight thousand, nine hundred thirty-one".