37896157861 has 2 divisors, whose sum is σ = 37896157862. Its totient is φ = 37896157860.

The previous prime is 37896157813. The next prime is 37896157919. The reversal of 37896157861 is 16875169873.

37896157861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22413084100 + 15483073761 = 149710^2 + 124431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37896157861 is a prime.

It is a super-2 number, since 2×37896157861² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 37896157861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37896157661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18948078930 + 18948078931.

It is an arithmetic number, because the mean of its divisors is an integer number (18948078931).

Almost surely, 2^37896157861 is an apocalyptic number.

It is an amenable number.

37896157861 is a deficient number, since it is larger than the sum of its proper divisors (1).

37896157861 is an equidigital number, since it uses as much as digits as its factorization.

37896157861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 61.

The spelling of 37896157861 in words is "thirty-seven billion, eight hundred ninety-six million, one hundred fifty-seven thousand, eight hundred sixty-one".