37878617994 has 64 divisors (see below), whose sum is σ = 87987444480. Its totient is φ = 10647244800.

The previous prime is 37878617981. The next prime is 37878618007. The reversal of 37878617994 is 49971687873.

It is an interprime number because it is at equal distance from previous prime (37878617981) and next prime (37878618007).

It is a super-2 number, since 2×37878617994² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1214062 + ... + 1244870.

It is an arithmetic number, because the mean of its divisors is an integer number (1374803820).

Almost surely, 2^37878617994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37878617994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43993722240).

37878617994 is an abundant number, since it is smaller than the sum of its proper divisors (50108826486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

37878617994 is a wasteful number, since it uses less digits than its factorization.

37878617994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31295.

The product of its digits is 128024064, while the sum is 69.

The spelling of 37878617994 in words is "thirty-seven billion, eight hundred seventy-eight million, six hundred seventeen thousand, nine hundred ninety-four".