78885857458 has 16 divisors (see below), whose sum is σ = 121186707840. Its totient is φ = 38500160400.

The previous prime is 78885857443. The next prime is 78885857489. The reversal of 78885857458 is 85475858887.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2451978 + ... + 2483941.

It is an arithmetic number, because the mean of its divisors is an integer number (7574169240).

Almost surely, 2^78885857458 is an apocalyptic number.

78885857458 is a deficient number, since it is larger than the sum of its proper divisors (42300850382).

78885857458 is a wasteful number, since it uses less digits than its factorization.

78885857458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936113.

The product of its digits is 802816000, while the sum is 73.

The spelling of 78885857458 in words is "seventy-eight billion, eight hundred eighty-five million, eight hundred fifty-seven thousand, four hundred fifty-eight".