37661140525639 has 2 divisors, whose sum is σ = 37661140525640. Its totient is φ = 37661140525638.

The previous prime is 37661140525597. The next prime is 37661140525721. The reversal of 37661140525639 is 93652504116673.

It is a weak prime.

It is an emirp because it is prime and its reverse (93652504116673) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37661140525639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37661140520639) 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, 18830570262819 + 18830570262820.

It is an arithmetic number, because the mean of its divisors is an integer number (18830570262820).

Almost surely, 2^{37661140525639} is an apocalyptic number.

37661140525639 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661140525639 is an equidigital number, since it uses as much as digits as its factorization.

37661140525639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 58.

The spelling of 37661140525639 in words is "thirty-seven trillion, six hundred sixty-one billion, one hundred forty million, five hundred twenty-five thousand, six hundred thirty-nine".