45472791281 has 4 divisors (see below), whose sum is σ = 45473670000. Its totient is φ = 45471912564.

The previous prime is 45472791251. The next prime is 45472791317. The reversal of 45472791281 is 18219727454.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18219727454 = 2 ⋅9109863727.

It is a cyclic number.

It is not a de Polignac number, because 45472791281 - 2²² = 45468596977 is a prime.

It is a super-2 number, since 2×45472791281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45472791211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356531 + ... + 466968.

It is an arithmetic number, because the mean of its divisors is an integer number (11368417500).

Almost surely, 2^45472791281 is an apocalyptic number.

It is an amenable number.

45472791281 is a deficient number, since it is larger than the sum of its proper divisors (878719).

45472791281 is an equidigital number, since it uses as much as digits as its factorization.

45472791281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878718.

The product of its digits is 1128960, while the sum is 50.

The spelling of 45472791281 in words is "forty-five billion, four hundred seventy-two million, seven hundred ninety-one thousand, two hundred eighty-one".