37986868978 has 4 divisors (see below), whose sum is σ = 56980303470. Its totient is φ = 18993434488.

The previous prime is 37986868937. The next prime is 37986868987. The reversal of 37986868978 is 87986868973.

37986868978 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: 87986868973 = 3643 ⋅24152311.

It can be written as a sum of positive squares in only one way, i.e., 26734539049 + 11252329929 = 163507^2 + 106077^2 .

It is a super-3 number, since 3×37986868978³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 37986868898 and 37986868907.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9496717243 + ... + 9496717246.

Almost surely, 2^37986868978 is an apocalyptic number.

37986868978 is a deficient number, since it is larger than the sum of its proper divisors (18993434492).

37986868978 is a wasteful number, since it uses less digits than its factorization.

37986868978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18993434491.

The product of its digits is 1755758592, while the sum is 79.

The spelling of 37986868978 in words is "thirty-seven billion, nine hundred eighty-six million, eight hundred sixty-eight thousand, nine hundred seventy-eight".