77701631 has 8 divisors (see below), whose sum is σ = 89617440. Its totient is φ = 65989728.

The previous prime is 77701609. The next prime is 77701633. The reversal of 77701631 is 13610777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77701631 - 2¹⁴ = 77685247 is a prime.

It is a super-2 number, since 2×77701631² = 12075086920120322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77701633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50156 + ... + 51681.

It is an arithmetic number, because the mean of its divisors is an integer number (11202180).

Almost surely, 2^77701631 is an apocalyptic number.

77701631 is a deficient number, since it is larger than the sum of its proper divisors (11915809).

77701631 is a wasteful number, since it uses less digits than its factorization.

77701631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101953.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 77701631 is about 8814.8528632076. The cubic root of 77701631 is about 426.7203733528.

The spelling of 77701631 in words is "seventy-seven million, seven hundred one thousand, six hundred thirty-one".