5615757718081 has 81 divisors (see below), whose sum is σ = 7019166981603. Its totient is φ = 4479413252160.

The previous prime is 5615757718073. The next prime is 5615757718097. The reversal of 5615757718081 is 1808177575165.

The square root of 5615757718081 is 2369759.

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

It can be written as a sum of positive squares in only one way, i.e., 270598676481 + 5345159041600 = 520191^2 + 2311960^2 .

It is not a de Polignac number, because 5615757718081 - 2³ = 5615757718073 is a prime.

It is a super-2 number, since 2×5615757718081² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5615757718061) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 15642778980 + ... + 15642779338.

Almost surely, 2^{5615757718081} is an apocalyptic number.

5615757718081 is the 2369759-th square number.

5615757718081 is the 1184880-th centered octagonal number.

It is an amenable number.

5615757718081 is a deficient number, since it is larger than the sum of its proper divisors (1403409263522).

5615757718081 is an frugal number, since it uses more digits than its factorization.

5615757718081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 16464000, while the sum is 61.

The spelling of 5615757718081 in words is "five trillion, six hundred fifteen billion, seven hundred fifty-seven million, seven hundred eighteen thousand, eighty-one".