72102039078 has 32 divisors (see below), whose sum is σ = 153622627200. Its totient is φ = 22494735936.

The previous prime is 72102039077. The next prime is 72102039103. The reversal of 72102039078 is 87093020127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102039077) 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, 3800623 + ... + 3819546.

It is an arithmetic number, because the mean of its divisors is an integer number (4800707100).

Almost surely, 2^72102039078 is an apocalyptic number.

72102039078 is an abundant number, since it is smaller than the sum of its proper divisors (81520588122).

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

72102039078 is a wasteful number, since it uses less digits than its factorization.

72102039078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620276.

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 72102039078 in words is "seventy-two billion, one hundred two million, thirty-nine thousand, seventy-eight".