87979097978 has 32 divisors (see below), whose sum is σ = 137033164800. Its totient is φ = 42333840000.

The previous prime is 87979097977. The next prime is 87979098061.

87979097978 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (87979097977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2224823 + ... + 2264021.

It is an arithmetic number, because the mean of its divisors is an integer number (4282286400).

Almost surely, 2^87979097978 is an apocalyptic number.

87979097978 is a deficient number, since it is larger than the sum of its proper divisors (49054066822).

87979097978 is a wasteful number, since it uses less digits than its factorization.

87979097978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39614.

The product of its (nonzero) digits is 1008189504, while the sum is 80.

The spelling of 87979097978 in words is "eighty-seven billion, nine hundred seventy-nine million, ninety-seven thousand, nine hundred seventy-eight".