45881781 has 8 divisors (see below), whose sum is σ = 66737184. Its totient is φ = 27807120.

The previous prime is 45881779. The next prime is 45881783. The reversal of 45881781 is 18718854.

It is an interprime number because it is at equal distance from previous prime (45881779) and next prime (45881783).

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

It is not a de Polignac number, because 45881781 - 2¹ = 45881779 is a prime.

It is a super-2 number, since 2×45881781² = 4210275655463922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45881783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695146 + ... + 695211.

It is an arithmetic number, because the mean of its divisors is an integer number (8342148).

Almost surely, 2^45881781 is an apocalyptic number.

It is an amenable number.

45881781 is a deficient number, since it is larger than the sum of its proper divisors (20855403).

45881781 is a wasteful number, since it uses less digits than its factorization.

45881781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390371.

The product of its digits is 71680, while the sum is 42.

The square root of 45881781 is about 6773.6091561294. The cubic root of 45881781 is about 357.9975786068.

The spelling of 45881781 in words is "forty-five million, eight hundred eighty-one thousand, seven hundred eighty-one".