78951034021 has 16 divisors (see below), whose sum is σ = 83793009600. Its totient is φ = 74273237248.

The previous prime is 78951034013. The next prime is 78951034027. The reversal of 78951034021 is 12043015987.

It is not a de Polignac number, because 78951034021 - 2³ = 78951034013 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 (78951034027) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10831 + ... + 397516.

It is an arithmetic number, because the mean of its divisors is an integer number (5237063100).

Almost surely, 2^78951034021 is an apocalyptic number.

It is an amenable number.

78951034021 is a deficient number, since it is larger than the sum of its proper divisors (4841975579).

78951034021 is a wasteful number, since it uses less digits than its factorization.

78951034021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408548.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 78951034021 in words is "seventy-eight billion, nine hundred fifty-one million, thirty-four thousand, twenty-one".