78501478645028 has 12 divisors (see below), whose sum is σ = 138426271504752. Its totient is φ = 38951115357960.

The previous prime is 78501478645003. The next prime is 78501478645039. The reversal of 78501478645028 is 82054687410587.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74905990550 + ... + 74905991597.

It is an arithmetic number, because the mean of its divisors is an integer number (11535522625396).

Almost surely, 2^{78501478645028} is an apocalyptic number.

It is an amenable number.

78501478645028 is a deficient number, since it is larger than the sum of its proper divisors (59924792859724).

78501478645028 is a wasteful number, since it uses less digits than its factorization.

78501478645028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149811982282 (or 149811982280 counting only the distinct ones).

The product of its (nonzero) digits is 120422400, while the sum is 65.

The spelling of 78501478645028 in words is "seventy-eight trillion, five hundred one billion, four hundred seventy-eight million, six hundred forty-five thousand, twenty-eight".