74861884881 has 135 divisors (see below), whose sum is σ = 134516184363. Its totient is φ = 41369680800.

The previous prime is 74861884861. The next prime is 74861884883. The reversal of 74861884881 is 18848816847.

The square root of 74861884881 is 273609.

It is a perfect power (a square), and thus also a powerful number.

74861884881 is a `hidden beast` number, since 7 + 4 + 8 + 618 + 8 + 4 + 8 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71926412481 + 2935472400 = 268191^2 + 54180^2 .

It is not a de Polignac number, because 74861884881 - 2⁵ = 74861884849 is a prime.

It is a super-2 number, since 2×74861884881² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (74861884883) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 741206731 + ... + 741206831.

Almost surely, 2^74861884881 is an apocalyptic number.

74861884881 is the 273609-th square number.

74861884881 is the 136805-th centered octagonal number.

It is an amenable number.

74861884881 is a deficient number, since it is larger than the sum of its proper divisors (59654299482).

74861884881 is an equidigital number, since it uses as much as digits as its factorization.

74861884881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 154 counting only the distinct ones).

The product of its digits is 22020096, while the sum is 63.

The spelling of 74861884881 in words is "seventy-four billion, eight hundred sixty-one million, eight hundred eighty-four thousand, eight hundred eighty-one".