37661372989 has 2 divisors, whose sum is σ = 37661372990. Its totient is φ = 37661372988.

The previous prime is 37661372921. The next prime is 37661373017. The reversal of 37661372989 is 98927316673.

37661372989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33127640100 + 4533732889 = 182010^2 + 67333^2 .

It is an emirp because it is prime and its reverse (98927316673) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37661372989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37661322989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830686494 + 18830686495.

It is an arithmetic number, because the mean of its divisors is an integer number (18830686495).

Almost surely, 2^37661372989 is an apocalyptic number.

It is an amenable number.

37661372989 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661372989 is an equidigital number, since it uses as much as digits as its factorization.

37661372989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 61.

The spelling of 37661372989 in words is "thirty-seven billion, six hundred sixty-one million, three hundred seventy-two thousand, nine hundred eighty-nine".