45144841981 has 8 divisors (see below), whose sum is σ = 46730455200. Its totient is φ = 43561155120.

The previous prime is 45144841979. The next prime is 45144841999. The reversal of 45144841981 is 18914844154.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 45144841981 - 2¹ = 45144841979 is a prime.

It is a super-2 number, since 2×45144841981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45144841921) 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, 433815 + ... + 527716.

It is an arithmetic number, because the mean of its divisors is an integer number (5841306900).

Almost surely, 2^45144841981 is an apocalyptic number.

It is an amenable number.

45144841981 is a deficient number, since it is larger than the sum of its proper divisors (1585613219).

45144841981 is a wasteful number, since it uses less digits than its factorization.

45144841981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963179.

The product of its digits is 737280, while the sum is 49.

The spelling of 45144841981 in words is "forty-five billion, one hundred forty-four million, eight hundred forty-one thousand, nine hundred eighty-one".