37402975978 has 4 divisors (see below), whose sum is σ = 56104463970. Its totient is φ = 18701487988.

The previous prime is 37402975963. The next prime is 37402976011. The reversal of 37402975978 is 87957920473.

37402975978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87957920473 = 269 ⋅326981117.

It can be written as a sum of positive squares in only one way, i.e., 26186683329 + 11216292649 = 161823^2 + 105907^2 .

It is a super-2 number, since 2×37402975978² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350743993 + ... + 9350743996.

Almost surely, 2^37402975978 is an apocalyptic number.

37402975978 is a deficient number, since it is larger than the sum of its proper divisors (18701487992).

37402975978 is a wasteful number, since it uses less digits than its factorization.

37402975978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18701487991.

The product of its (nonzero) digits is 26671680, while the sum is 61.

The spelling of 37402975978 in words is "thirty-seven billion, four hundred two million, nine hundred seventy-five thousand, nine hundred seventy-eight".