78631029072 has 80 divisors (see below), whose sum is σ = 225751354560. Its totient is φ = 26204400000.

The previous prime is 78631029011. The next prime is 78631029073. The reversal of 78631029072 is 27092013687.

78631029072 is a `hidden beast` number, since 7 + 8 + 631 + 0 + 2 + 9 + 0 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78631029073) 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, 2150947 + ... + 2187197.

It is an arithmetic number, because the mean of its divisors is an integer number (2821891932).

Almost surely, 2^78631029072 is an apocalyptic number.

78631029072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78631029072 is an abundant number, since it is smaller than the sum of its proper divisors (147120325488).

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

78631029072 is a wasteful number, since it uses less digits than its factorization.

78631029072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41289 (or 41277 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 78631029072 in words is "seventy-eight billion, six hundred thirty-one million, twenty-nine thousand, seventy-two".