53990704881 has 27 divisors (see below), whose sum is σ = 79144111137. Its totient is φ = 35467277760.

The previous prime is 53990704879. The next prime is 53990704883. The reversal of 53990704881 is 18840709935.

The square root of 53990704881 is 232359.

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

53990704881 is a `hidden beast` number, since 5 + 3 + 9 + 90 + 70 + 488 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (53990704879) and next prime (53990704883).

It can be written as a sum of positive squares in 4 ways, for example, as 2786256225 + 51204448656 = 52785^2 + 226284^2 .

It is not a de Polignac number, because 53990704881 - 2¹ = 53990704879 is a prime.

It is a super-2 number, since 2×53990704881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53990704883) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 50886091 + ... + 50887151.

Almost surely, 2^53990704881 is an apocalyptic number.

53990704881 is the 232359-th square number.

53990704881 is the 116180-th centered octagonal number.

It is an amenable number.

53990704881 is a deficient number, since it is larger than the sum of its proper divisors (25153406256).

53990704881 is an frugal number, since it uses more digits than its factorization.

53990704881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274 (or 1137 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 53990704881 in words is "fifty-three billion, nine hundred ninety million, seven hundred four thousand, eight hundred eighty-one".