37686906381 has 12 divisors (see below), whose sum is σ = 52528947968. Its totient is φ = 24032229144.

The previous prime is 37686906371. The next prime is 37686906403. The reversal of 37686906381 is 18360968673.

It is not a de Polignac number, because 37686906381 - 2⁵ = 37686906349 is a prime.

It is a super-2 number, since 2×37686906381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37686906371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11872045 + ... + 11875218.

Almost surely, 2^37686906381 is an apocalyptic number.

It is an amenable number.

37686906381 is a deficient number, since it is larger than the sum of its proper divisors (14842041587).

37686906381 is a wasteful number, since it uses less digits than its factorization.

37686906381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23747312 (or 23747289 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 37686906381 in words is "thirty-seven billion, six hundred eighty-six million, nine hundred six thousand, three hundred eighty-one".