45981615 has 16 divisors (see below), whose sum is σ = 77443200. Its totient is φ = 23232672.

The previous prime is 45981571. The next prime is 45981619. The reversal of 45981615 is 51618954.

It is not a de Polignac number, because 45981615 - 2⁷ = 45981487 is a prime.

It is a super-4 number, since 4×45981615⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45981619) 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 15 ways as a sum of consecutive naturals, for example, 80385 + ... + 80954.

It is an arithmetic number, because the mean of its divisors is an integer number (4840200).

Almost surely, 2^45981615 is an apocalyptic number.

45981615 is a deficient number, since it is larger than the sum of its proper divisors (31461585).

45981615 is a wasteful number, since it uses less digits than its factorization.

45981615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161366.

The product of its digits is 43200, while the sum is 39.

The square root of 45981615 is about 6780.9744874907. The cubic root of 45981615 is about 358.2570457153.

The spelling of 45981615 in words is "forty-five million, nine hundred eighty-one thousand, six hundred fifteen".