77907612427 has 8 divisors (see below), whose sum is σ = 82494444816. Its totient is φ = 73321228032.

The previous prime is 77907612371. The next prime is 77907612449. The reversal of 77907612427 is 72421670977.

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 not a de Polignac number, because 77907612427 - 2²³ = 77899223819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77907612487) 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, 286608 + ... + 487810.

It is an arithmetic number, because the mean of its divisors is an integer number (10311805602).

Almost surely, 2^77907612427 is an apocalyptic number.

77907612427 is a deficient number, since it is larger than the sum of its proper divisors (4586832389).

77907612427 is a wasteful number, since it uses less digits than its factorization.

77907612427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223997.

The product of its (nonzero) digits is 2074464, while the sum is 52.

The spelling of 77907612427 in words is "seventy-seven billion, nine hundred seven million, six hundred twelve thousand, four hundred twenty-seven".