37921478408 has 60 divisors (see below), whose sum is σ = 78350261325. Its totient is φ = 17206742080.

The previous prime is 37921478369. The next prime is 37921478437. The reversal of 37921478408 is 80487412973.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 33030154564 + 4891323844 = 181742^2 + 69938^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=137698.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 37921478408.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 66645548 + ... + 66646116.

Almost surely, 2^37921478408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37921478408

37921478408 is an abundant number, since it is smaller than the sum of its proper divisors (40428782917).

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

37921478408 is an frugal number, since it uses more digits than its factorization.

37921478408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 37921478408 in words is "thirty-seven billion, nine hundred twenty-one million, four hundred seventy-eight thousand, four hundred eight".