45615681 has 12 divisors (see below), whose sum is σ = 66103908. Its totient is φ = 30311424.

The previous prime is 45615671. The next prime is 45615761. The reversal of 45615681 is 18651654.

It can be written as a sum of positive squares in 2 ways, for example, as 21762225 + 23853456 = 4665^2 + 4884^2 .

It is not a de Polignac number, because 45615681 - 2²¹ = 43518529 is a prime.

It is a super-2 number, since 2×45615681² = 4161580706187522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45615631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5280 + ... + 10913.

It is an arithmetic number, because the mean of its divisors is an integer number (5508659).

Almost surely, 2^45615681 is an apocalyptic number.

It is an amenable number.

45615681 is a deficient number, since it is larger than the sum of its proper divisors (20488227).

45615681 is a wasteful number, since it uses less digits than its factorization.

45615681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16512 (or 16509 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 45615681 is about 6753.9381844965. The cubic root of 45615681 is about 357.3041449258.

The spelling of 45615681 in words is "forty-five million, six hundred fifteen thousand, six hundred eighty-one".