77492239641 has 6 divisors (see below), whose sum is σ = 111933235050. Its totient is φ = 51661493088.

The previous prime is 77492239639. The next prime is 77492239661. The reversal of 77492239641 is 14693229477.

77492239641 is a `hidden beast` number, since 7 + 7 + 492 + 23 + 96 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54328617225 + 23163622416 = 233085^2 + 152196^2 .

It is not a de Polignac number, because 77492239641 - 2¹ = 77492239639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77492239631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4305124416 + ... + 4305124433.

It is an arithmetic number, because the mean of its divisors is an integer number (18655539175).

Almost surely, 2^77492239641 is an apocalyptic number.

It is an amenable number.

77492239641 is a deficient number, since it is larger than the sum of its proper divisors (34440995409).

77492239641 is a wasteful number, since it uses less digits than its factorization.

77492239641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610248855 (or 8610248852 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 77492239641 in words is "seventy-seven billion, four hundred ninety-two million, two hundred thirty-nine thousand, six hundred forty-one".