61217760127144 has 64 divisors (see below), whose sum is σ = 115600259174400. Its totient is φ = 30391523675136.

The previous prime is 61217760127141. The next prime is 61217760127177. The reversal of 61217760127144 is 44172106771216.

It is a happy number.

It is a super-2 number, since 2×61217760127144² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61217760127141) 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, 3427061557 + ... + 3427079419.

It is an arithmetic number, because the mean of its divisors is an integer number (1806254049600).

Almost surely, 2^{61217760127144} is an apocalyptic number.

It is an amenable number.

61217760127144 is a deficient number, since it is larger than the sum of its proper divisors (54382499047256).

61217760127144 is a wasteful number, since it uses less digits than its factorization.

61217760127144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21194 (or 21190 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 61217760127144 in words is "sixty-one trillion, two hundred seventeen billion, seven hundred sixty million, one hundred twenty-seven thousand, one hundred forty-four".