37984821381 has 12 divisors (see below), whose sum is σ = 59087500108. Its totient is φ = 23375274624.

The previous prime is 37984821349. The next prime is 37984821401. The reversal of 37984821381 is 18312848973.

It is a happy number.

37984821381 is a `hidden beast` number, since 3 + 79 + 8 + 482 + 13 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1812204900 + 36172616481 = 42570^2 + 190191^2 .

It is not a de Polignac number, because 37984821381 - 2⁵ = 37984821349 is a prime.

It is a super-2 number, since 2×37984821381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37984821331) 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, 162328180 + ... + 162328413.

Almost surely, 2^37984821381 is an apocalyptic number.

It is an amenable number.

37984821381 is a deficient number, since it is larger than the sum of its proper divisors (21102678727).

37984821381 is a wasteful number, since it uses less digits than its factorization.

37984821381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324656612 (or 324656609 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 37984821381 in words is "thirty-seven billion, nine hundred eighty-four million, eight hundred twenty-one thousand, three hundred eighty-one".