37881938123 has 4 divisors (see below), whose sum is σ = 39875724360. Its totient is φ = 35888151888.

The previous prime is 37881938113. The next prime is 37881938137. The reversal of 37881938123 is 32183918873.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 37881938123 - 2³⁴ = 20702068939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37881938113) 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, 996893090 + ... + 996893127.

It is an arithmetic number, because the mean of its divisors is an integer number (9968931090).

Almost surely, 2^37881938123 is an apocalyptic number.

37881938123 is a deficient number, since it is larger than the sum of its proper divisors (1993786237).

37881938123 is a wasteful number, since it uses less digits than its factorization.

37881938123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993786236.

The product of its digits is 1741824, while the sum is 53.

The spelling of 37881938123 in words is "thirty-seven billion, eight hundred eighty-one million, nine hundred thirty-eight thousand, one hundred twenty-three".