83118748978 has 4 divisors (see below), whose sum is σ = 124678123470. Its totient is φ = 41559374488.

The previous prime is 83118748967. The next prime is 83118749003. The reversal of 83118748978 is 87984781138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80966995209 + 2151753769 = 284547^2 + 46387^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20779687243 + ... + 20779687246.

Almost surely, 2^83118748978 is an apocalyptic number.

83118748978 is a deficient number, since it is larger than the sum of its proper divisors (41559374492).

83118748978 is a wasteful number, since it uses less digits than its factorization.

83118748978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41559374491.

The product of its digits is 21676032, while the sum is 64.

The spelling of 83118748978 in words is "eighty-three billion, one hundred eighteen million, seven hundred forty-eight thousand, nine hundred seventy-eight".