37345725561 has 4 divisors (see below), whose sum is σ = 49794300752. Its totient is φ = 24897150372.

The previous prime is 37345725551. The next prime is 37345725581. The reversal of 37345725561 is 16552754373.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 37345725561 - 2⁷ = 37345725433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 37345725561.

It is not an unprimeable number, because it can be changed into a prime (37345725551) 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 in 3 ways as a sum of consecutive naturals, for example, 6224287591 + ... + 6224287596.

It is an arithmetic number, because the mean of its divisors is an integer number (12448575188).

Almost surely, 2^37345725561 is an apocalyptic number.

It is an amenable number.

37345725561 is a deficient number, since it is larger than the sum of its proper divisors (12448575191).

37345725561 is a wasteful number, since it uses less digits than its factorization.

37345725561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12448575190.

The product of its digits is 2646000, while the sum is 48.

The spelling of 37345725561 in words is "thirty-seven billion, three hundred forty-five million, seven hundred twenty-five thousand, five hundred sixty-one".