37661140520999 has 2 divisors, whose sum is σ = 37661140521000. Its totient is φ = 37661140520998.

The previous prime is 37661140520981. The next prime is 37661140521007. The reversal of 37661140520999 is 99902504116673.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 37661140520999 - 2²⁰ = 37661139472423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37661140520599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830570260499 + 18830570260500.

It is an arithmetic number, because the mean of its divisors is an integer number (18830570260500).

Almost surely, 2^{37661140520999} is an apocalyptic number.

37661140520999 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661140520999 is an equidigital number, since it uses as much as digits as its factorization.

37661140520999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22044960, while the sum is 62.

The spelling of 37661140520999 in words is "thirty-seven trillion, six hundred sixty-one billion, one hundred forty million, five hundred twenty thousand, nine hundred ninety-nine".