77908015493 has 8 divisors (see below), whose sum is σ = 97132071360. Its totient is φ = 60707544480.

The previous prime is 77908015489. The next prime is 77908015543. The reversal of 77908015493 is 39451080977.

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

It is not a de Polignac number, because 77908015493 - 2² = 77908015489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77908015433) 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 7 ways as a sum of consecutive naturals, for example, 505896128 + ... + 505896281.

It is an arithmetic number, because the mean of its divisors is an integer number (12141508920).

Almost surely, 2^77908015493 is an apocalyptic number.

It is an amenable number.

77908015493 is a deficient number, since it is larger than the sum of its proper divisors (19224055867).

77908015493 is a wasteful number, since it uses less digits than its factorization.

77908015493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011792427.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 77908015493 in words is "seventy-seven billion, nine hundred eight million, fifteen thousand, four hundred ninety-three".