61530167404981 has 16 divisors (see below), whose sum is σ = 67185150480000. Its totient is φ = 55885419532800.

The previous prime is 61530167404891. The next prime is 61530167404997. The reversal of 61530167404981 is 18940476103516.

It is not a de Polignac number, because 61530167404981 - 2¹¹ = 61530167402933 is a prime.

It is a super-2 number, since 2×61530167404981² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61530167404081) 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, 93382120 + ... + 94038718.

It is an arithmetic number, because the mean of its divisors is an integer number (4199071905000).

Almost surely, 2^{61530167404981} is an apocalyptic number.

It is an amenable number.

61530167404981 is a deficient number, since it is larger than the sum of its proper divisors (5654983075019).

61530167404981 is a wasteful number, since it uses less digits than its factorization.

61530167404981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664380.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 61530167404981 in words is "sixty-one trillion, five hundred thirty billion, one hundred sixty-seven million, four hundred four thousand, nine hundred eighty-one".