97879767840 has 144 divisors (see below), whose sum is σ = 348537204288. Its totient is φ = 24966425088.

The previous prime is 97879767793. The next prime is 97879767871. The reversal of 97879767840 is 4876797879.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1444534 + ... + 1510773.

It is an arithmetic number, because the mean of its divisors is an integer number (2420397252).

Almost surely, 2^97879767840 is an apocalyptic number.

97879767840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97879767840 is an abundant number, since it is smaller than the sum of its proper divisors (250657436448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97879767840 is a wasteful number, since it uses less digits than its factorization.

97879767840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955351 (or 2955340 counting only the distinct ones).

The product of its (nonzero) digits is 298722816, while the sum is 72.

The spelling of 97879767840 in words is "ninety-seven billion, eight hundred seventy-nine million, seven hundred sixty-seven thousand, eight hundred forty".