37506577645 has 4 divisors (see below), whose sum is σ = 45007893180. Its totient is φ = 30005262112.

The previous prime is 37506577639. The next prime is 37506577663. The reversal of 37506577645 is 54677560573.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54677560573 = 107 ⋅511005239.

It can be written as a sum of positive squares in 2 ways, for example, as 25241901129 + 12264676516 = 158877^2 + 110746^2 .

It is a cyclic number.

It is not a de Polignac number, because 37506577645 - 2⁷ = 37506577517 is a prime.

It is a super-3 number, since 3×37506577645³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3750657760 + ... + 3750657769.

It is an arithmetic number, because the mean of its divisors is an integer number (11251973295).

Almost surely, 2^37506577645 is an apocalyptic number.

It is an amenable number.

37506577645 is a deficient number, since it is larger than the sum of its proper divisors (7501315535).

37506577645 is an equidigital number, since it uses as much as digits as its factorization.

37506577645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7501315534.

The product of its (nonzero) digits is 18522000, while the sum is 55.

The spelling of 37506577645 in words is "thirty-seven billion, five hundred six million, five hundred seventy-seven thousand, six hundred forty-five".