77867481251 has 16 divisors (see below), whose sum is σ = 91072337664. Its totient is φ = 65183245344.

The previous prime is 77867481247. The next prime is 77867481311. The reversal of 77867481251 is 15218476877.

It is not a de Polignac number, because 77867481251 - 2² = 77867481247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77867481221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4445156 + ... + 4462638.

It is an arithmetic number, because the mean of its divisors is an integer number (5692021104).

Almost surely, 2^77867481251 is an apocalyptic number.

77867481251 is a deficient number, since it is larger than the sum of its proper divisors (13204856413).

77867481251 is a wasteful number, since it uses less digits than its factorization.

77867481251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32330.

The product of its digits is 5268480, while the sum is 56.

The spelling of 77867481251 in words is "seventy-seven billion, eight hundred sixty-seven million, four hundred eighty-one thousand, two hundred fifty-one".