76457227081 has 9 divisors (see below), whose sum is σ = 77634223149. Its totient is φ = 75297824844.

The previous prime is 76457227057. The next prime is 76457227087. The reversal of 76457227081 is 18072275467.

The square root of 76457227081 is 276509.

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

It is not a de Polignac number, because 76457227081 - 2¹⁵ = 76457194313 is a prime.

It is a super-2 number, since 2×76457227081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76457227087) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18524040 + ... + 18528166.

Almost surely, 2^76457227081 is an apocalyptic number.

76457227081 is the 276509-th square number.

76457227081 is the 138255-th centered octagonal number.

It is an amenable number.

76457227081 is a deficient number, since it is larger than the sum of its proper divisors (1176996068).

76457227081 is an frugal number, since it uses more digits than its factorization.

76457227081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8388 (or 4194 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

Multiplying 76457227081 by its sum of digits (49), we get a square (3746404126969 = 1935563²).

The spelling of 76457227081 in words is "seventy-six billion, four hundred fifty-seven million, two hundred twenty-seven thousand, eighty-one".