77081250131 has 8 divisors (see below), whose sum is σ = 78965011104. Its totient is φ = 75197666880.

The previous prime is 77081250061. The next prime is 77081250137. The reversal of 77081250131 is 13105218077.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77081250131 is a prime.

It is a super-2 number, since 2×77081250131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77081250091 and 77081250100.

It is not an unprimeable number, because it can be changed into a prime (77081250137) 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, 1400081 + ... + 1454093.

It is an arithmetic number, because the mean of its divisors is an integer number (9870626388).

Almost surely, 2^77081250131 is an apocalyptic number.

77081250131 is a deficient number, since it is larger than the sum of its proper divisors (1883760973).

77081250131 is a wasteful number, since it uses less digits than its factorization.

77081250131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88861.

The product of its (nonzero) digits is 11760, while the sum is 35.

The spelling of 77081250131 in words is "seventy-seven billion, eighty-one million, two hundred fifty thousand, one hundred thirty-one".