37998518401 has 4 divisors (see below), whose sum is σ = 38036030292. Its totient is φ = 37961006512.

The previous prime is 37998518387. The next prime is 37998518413. The reversal of 37998518401 is 10481589973.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10481589973 = 29 ⋅361434137.

It can be written as a sum of positive squares in 2 ways, for example, as 3825298801 + 34173219600 = 61849^2 + 184860^2 .

It is a cyclic number.

It is not a de Polignac number, because 37998518401 - 2⁹ = 37998517889 is a prime.

It is a super-2 number, since 2×37998518401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37998518461) 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, 18754426 + ... + 18756451.

It is an arithmetic number, because the mean of its divisors is an integer number (9509007573).

Almost surely, 2^37998518401 is an apocalyptic number.

It is an amenable number.

37998518401 is a deficient number, since it is larger than the sum of its proper divisors (37511891).

37998518401 is a wasteful number, since it uses less digits than its factorization.

37998518401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37511890.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 37998518401 in words is "thirty-seven billion, nine hundred ninety-eight million, five hundred eighteen thousand, four hundred one".