77970662831 has 4 divisors (see below), whose sum is σ = 79629613152. Its totient is φ = 76311712512.

The previous prime is 77970662827. The next prime is 77970662857. The reversal of 77970662831 is 13826607977.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77970662831 - 2² = 77970662827 is a prime.

It is a super-4 number, since 4×77970662831⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77970662431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829475090 + ... + 829475183.

It is an arithmetic number, because the mean of its divisors is an integer number (19907403288).

Almost surely, 2^77970662831 is an apocalyptic number.

77970662831 is a deficient number, since it is larger than the sum of its proper divisors (1658950321).

77970662831 is a wasteful number, since it uses less digits than its factorization.

77970662831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658950320.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 77970662831 in words is "seventy-seven billion, nine hundred seventy million, six hundred sixty-two thousand, eight hundred thirty-one".