96991271978 has 8 divisors (see below), whose sum is σ = 145570864068. Its totient is φ = 48467650624.

The previous prime is 96991271957. The next prime is 96991271987. The reversal of 96991271978 is 87917219969.

It can be written as a sum of positive squares in 2 ways, for example, as 96704206729 + 287065249 = 310973^2 + 16943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 13988351 + ... + 13995282.

Almost surely, 2^96991271978 is an apocalyptic number.

96991271978 is a deficient number, since it is larger than the sum of its proper divisors (48579592090).

96991271978 is a wasteful number, since it uses less digits than its factorization.

96991271978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27985368.

The product of its digits is 30862944, while the sum is 68.

The spelling of 96991271978 in words is "ninety-six billion, nine hundred ninety-one million, two hundred seventy-one thousand, nine hundred seventy-eight".