37518065681 has 16 divisors (see below), whose sum is σ = 39454593024. Its totient is φ = 35608052304.

The previous prime is 37518065609. The next prime is 37518065701. The reversal of 37518065681 is 18656081573.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37518065681 is a prime.

It is a super-2 number, since 2×37518065681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (37518065581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562690 + ... + 1586516.

It is an arithmetic number, because the mean of its divisors is an integer number (2465912064).

Almost surely, 2^37518065681 is an apocalyptic number.

It is an amenable number.

37518065681 is a deficient number, since it is larger than the sum of its proper divisors (1936527343).

37518065681 is a wasteful number, since it uses less digits than its factorization.

37518065681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24380.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 37518065681 in words is "thirty-seven billion, five hundred eighteen million, sixty-five thousand, six hundred eighty-one".