37978665858 has 96 divisors (see below), whose sum is σ = 97678788480. Its totient is φ = 10833989760.

The previous prime is 37978665827. The next prime is 37978665871. The reversal of 37978665858 is 85856687973.

37978665858 is a `hidden beast` number, since 37 + 9 + 7 + 8 + 6 + 6 + 585 + 8 = 666.

37978665858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×37978665858² (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 47 ways as a sum of consecutive naturals, for example, 2240278 + ... + 2257166.

It is an arithmetic number, because the mean of its divisors is an integer number (1017487380).

Almost surely, 2^37978665858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37978665858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48839394240).

37978665858 is an abundant number, since it is smaller than the sum of its proper divisors (59700122622).

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

37978665858 is a wasteful number, since it uses less digits than its factorization.

37978665858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17574 (or 17562 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 72.

The spelling of 37978665858 in words is "thirty-seven billion, nine hundred seventy-eight million, six hundred sixty-five thousand, eight hundred fifty-eight".