45720681 has 8 divisors (see below), whose sum is σ = 61186944. Its totient is φ = 30367440.

The previous prime is 45720679. The next prime is 45720713. The reversal of 45720681 is 18602754.

45720681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45720681 - 2¹ = 45720679 is a prime.

It is a super-2 number, since 2×45720681² = 4180761342207522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45720601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27306 + ... + 28931.

It is an arithmetic number, because the mean of its divisors is an integer number (7648368).

Almost surely, 2^45720681 is an apocalyptic number.

It is an amenable number.

45720681 is a deficient number, since it is larger than the sum of its proper divisors (15466263).

45720681 is a wasteful number, since it uses less digits than its factorization.

45720681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56511.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 45720681 is about 6761.7069590452. The cubic root of 45720681 is about 357.5780871693.

The spelling of 45720681 in words is "forty-five million, seven hundred twenty thousand, six hundred eighty-one".