37978415872 has 36 divisors (see below), whose sum is σ = 75954251016. Its totient is φ = 18952693760.

The previous prime is 37978415851. The next prime is 37978415873. The reversal of 37978415872 is 27851487973.

It is a self number, because there is not a number n which added to its sum of digits gives 37978415872.

It is not an unprimeable number, because it can be changed into a prime (37978415873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8998 + ... + 275749.

It is an arithmetic number, because the mean of its divisors is an integer number (2109840306).

Almost surely, 2^37978415872 is an apocalyptic number.

37978415872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

37978415872 is a deficient number, since it is larger than the sum of its proper divisors (37975835144).

37978415872 is an equidigital number, since it uses as much as digits as its factorization.

37978415872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285284 (or 285270 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 61.

The spelling of 37978415872 in words is "thirty-seven billion, nine hundred seventy-eight million, four hundred fifteen thousand, eight hundred seventy-two".