37648561 has 2 divisors, whose sum is σ = 37648562. Its totient is φ = 37648560.

The previous prime is 37648511. The next prime is 37648571. The reversal of 37648561 is 16584673.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28558336 + 9090225 = 5344^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 37648561 - 2⁹ = 37648049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37648511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18824280 + 18824281.

It is an arithmetic number, because the mean of its divisors is an integer number (18824281).

Almost surely, 2^37648561 is an apocalyptic number.

It is an amenable number.

37648561 is a deficient number, since it is larger than the sum of its proper divisors (1).

37648561 is an equidigital number, since it uses as much as digits as its factorization.

37648561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 37648561 is about 6135.8423219636. The cubic root of 37648561 is about 335.1578998709.

The spelling of 37648561 in words is "thirty-seven million, six hundred forty-eight thousand, five hundred sixty-one".