78985318490 has 32 divisors (see below), whose sum is σ = 153455734656. Its totient is φ = 29097956160.

The previous prime is 78985318483. The next prime is 78985318549. The reversal of 78985318490 is 9481358987.

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, 628166 + ... + 743345.

It is an arithmetic number, because the mean of its divisors is an integer number (4795491708).

Almost surely, 2^78985318490 is an apocalyptic number.

78985318490 is a deficient number, since it is larger than the sum of its proper divisors (74470416166).

78985318490 is a wasteful number, since it uses less digits than its factorization.

78985318490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371974.

The product of its (nonzero) digits is 17418240, while the sum is 62.

The spelling of 78985318490 in words is "seventy-eight billion, nine hundred eighty-five million, three hundred eighteen thousand, four hundred ninety".