78790406554 has 32 divisors (see below), whose sum is σ = 119863941120. Its totient is φ = 38840352768.

The previous prime is 78790406543. The next prime is 78790406561. The reversal of 78790406554 is 45560409787.

It is a junction number, because it is equal to n+sod(n) for n = 78790406495 and 78790406504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44338114 + ... + 44339890.

It is an arithmetic number, because the mean of its divisors is an integer number (3745748160).

Almost surely, 2^78790406554 is an apocalyptic number.

78790406554 is a deficient number, since it is larger than the sum of its proper divisors (41073534566).

78790406554 is a wasteful number, since it uses less digits than its factorization.

78790406554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 78790406554 in words is "seventy-eight billion, seven hundred ninety million, four hundred six thousand, five hundred fifty-four".