45037681 has 4 divisors (see below), whose sum is σ = 48502132. Its totient is φ = 41573232.

The previous prime is 45037679. The next prime is 45037693. The reversal of 45037681 is 18673054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18673054 = 2 ⋅9336527.

It can be written as a sum of positive squares in 2 ways, for example, as 8071281 + 36966400 = 2841^2 + 6080^2 .

It is a cyclic number.

It is not a de Polignac number, because 45037681 - 2¹ = 45037679 is a prime.

It is a super-2 number, since 2×45037681² = 4056785419715522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45037631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1732206 + ... + 1732231.

It is an arithmetic number, because the mean of its divisors is an integer number (12125533).

Almost surely, 2^45037681 is an apocalyptic number.

It is an amenable number.

45037681 is a deficient number, since it is larger than the sum of its proper divisors (3464451).

45037681 is a wasteful number, since it uses less digits than its factorization.

45037681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464450.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 45037681 is about 6711.0119207166. The cubic root of 45037681 is about 355.7885822301.

The spelling of 45037681 in words is "forty-five million, thirty-seven thousand, six hundred eighty-one".