78997056589 has 8 divisors (see below), whose sum is σ = 86694648768. Its totient is φ = 71385471360.

The previous prime is 78997056583. The next prime is 78997056623. The reversal of 78997056589 is 98565079987.

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

It is a cyclic number.

It is not a de Polignac number, because 78997056589 - 2³ = 78997056581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78997056581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21499812 + ... + 21503485.

It is an arithmetic number, because the mean of its divisors is an integer number (10836831096).

Almost surely, 2^78997056589 is an apocalyptic number.

It is an amenable number.

78997056589 is a deficient number, since it is larger than the sum of its proper divisors (7697592179).

78997056589 is a wasteful number, since it uses less digits than its factorization.

78997056589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43003475.

The product of its (nonzero) digits is 342921600, while the sum is 73.

The spelling of 78997056589 in words is "seventy-eight billion, nine hundred ninety-seven million, fifty-six thousand, five hundred eighty-nine".