778464082554 has 16 divisors (see below), whose sum is σ = 1557900656640. Its totient is φ = 259325945600.

The previous prime is 778464082549. The next prime is 778464082559. The reversal of 778464082554 is 455280464877.

It is an interprime number because it is at equal distance from previous prime (778464082549) and next prime (778464082559).

It is not an unprimeable number, because it can be changed into a prime (778464082559) 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, 40510074 + ... + 40529285.

It is an arithmetic number, because the mean of its divisors is an integer number (97368791040).

Almost surely, 2^778464082554 is an apocalyptic number.

778464082554 is an abundant number, since it is smaller than the sum of its proper divisors (779436574086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778464082554 is a wasteful number, since it uses less digits than its factorization.

778464082554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81040965.

The product of its (nonzero) digits is 60211200, while the sum is 60.

The spelling of 778464082554 in words is "seven hundred seventy-eight billion, four hundred sixty-four million, eighty-two thousand, five hundred fifty-four".