37785706997 has 2 divisors, whose sum is σ = 37785706998. Its totient is φ = 37785706996.

The previous prime is 37785706991. The next prime is 37785707009. The reversal of 37785706997 is 79960758773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28723809361 + 9061897636 = 169481^2 + 95194^2 .

It is a cyclic number.

It is not a de Polignac number, because 37785706997 - 2⁸ = 37785706741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37785706991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18892853498 + 18892853499.

It is an arithmetic number, because the mean of its divisors is an integer number (18892853499).

Almost surely, 2^37785706997 is an apocalyptic number.

It is an amenable number.

37785706997 is a deficient number, since it is larger than the sum of its proper divisors (1).

37785706997 is an equidigital number, since it uses as much as digits as its factorization.

37785706997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140026320, while the sum is 68.

The spelling of 37785706997 in words is "thirty-seven billion, seven hundred eighty-five million, seven hundred six thousand, nine hundred ninety-seven".