77615381607 has 8 divisors (see below), whose sum is σ = 107986617984. Its totient is φ = 49493866488.

The previous prime is 77615381587. The next prime is 77615381621. The reversal of 77615381607 is 70618351677.

It is a happy number.

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

It is not a de Polignac number, because 77615381607 - 2⁸ = 77615381351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77615381607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77615381707) 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, 562430233 + ... + 562430370.

It is an arithmetic number, because the mean of its divisors is an integer number (13498327248).

Almost surely, 2^77615381607 is an apocalyptic number.

77615381607 is a deficient number, since it is larger than the sum of its proper divisors (30371236377).

77615381607 is a wasteful number, since it uses less digits than its factorization.

77615381607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124860629.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 77615381607 in words is "seventy-seven billion, six hundred fifteen million, three hundred eighty-one thousand, six hundred seven".