78870977942 has 32 divisors (see below), whose sum is σ = 123821291520. Its totient is φ = 37607711680.

The previous prime is 78870977923. The next prime is 78870977951. The reversal of 78870977942 is 24977907887.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30439067 + ... + 30441657.

It is an arithmetic number, because the mean of its divisors is an integer number (3869415360).

Almost surely, 2^78870977942 is an apocalyptic number.

78870977942 is a deficient number, since it is larger than the sum of its proper divisors (44950313578).

78870977942 is a wasteful number, since it uses less digits than its factorization.

78870977942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348.

The product of its (nonzero) digits is 99574272, while the sum is 68.

The spelling of 78870977942 in words is "seventy-eight billion, eight hundred seventy million, nine hundred seventy-seven thousand, nine hundred forty-two".