37661140520639 has 2 divisors, whose sum is σ = 37661140520640. Its totient is φ = 37661140520638.

The previous prime is 37661140520599. The next prime is 37661140520657. The reversal of 37661140520639 is 93602504116673.

37661140520639 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 is a cyclic number.

It is not a de Polignac number, because 37661140520639 - 2³² = 37656845553343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37661140525639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830570260319 + 18830570260320.

It is an arithmetic number, because the mean of its divisors is an integer number (18830570260320).

Almost surely, 2^{37661140520639} is an apocalyptic number.

37661140520639 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661140520639 is an equidigital number, since it uses as much as digits as its factorization.

37661140520639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 37661140520639 in words is "thirty-seven trillion, six hundred sixty-one billion, one hundred forty million, five hundred twenty thousand, six hundred thirty-nine".