77445131007 has 16 divisors (see below), whose sum is σ = 107912821248. Its totient is φ = 49310558880.

The previous prime is 77445130993. The next prime is 77445131017. The reversal of 77445131007 is 70013154477.

It is not a de Polignac number, because 77445131007 - 2⁷ = 77445130879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77445131017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803403 + ... + 894620.

It is an arithmetic number, because the mean of its divisors is an integer number (6744551328).

Almost surely, 2^77445131007 is an apocalyptic number.

77445131007 is a deficient number, since it is larger than the sum of its proper divisors (30467690241).

77445131007 is a wasteful number, since it uses less digits than its factorization.

77445131007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698710.

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 77445131007 in words is "seventy-seven billion, four hundred forty-five million, one hundred thirty-one thousand, seven".