37977874061 has 2 divisors, whose sum is σ = 37977874062. Its totient is φ = 37977874060.

The previous prime is 37977874037. The next prime is 37977874097. The reversal of 37977874061 is 16047877973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25922932036 + 12054942025 = 161006^2 + 109795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37977874061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37977870061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18988937030 + 18988937031.

It is an arithmetic number, because the mean of its divisors is an integer number (18988937031).

Almost surely, 2^37977874061 is an apocalyptic number.

It is an amenable number.

37977874061 is a deficient number, since it is larger than the sum of its proper divisors (1).

37977874061 is an equidigital number, since it uses as much as digits as its factorization.

37977874061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12446784, while the sum is 59.

The spelling of 37977874061 in words is "thirty-seven billion, nine hundred seventy-seven million, eight hundred seventy-four thousand, sixty-one".