45309773981 has 4 divisors (see below), whose sum is σ = 45310427232. Its totient is φ = 45309120732.

The previous prime is 45309773969. The next prime is 45309774017. The reversal of 45309773981 is 18937790354.

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.

It is a cyclic number.

It is not a de Polignac number, because 45309773981 - 2²² = 45305579677 is a prime.

It is a super-2 number, since 2×45309773981² (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 (45309773911) 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, 208295 + ... + 366068.

It is an arithmetic number, because the mean of its divisors is an integer number (11327606808).

Almost surely, 2^45309773981 is an apocalyptic number.

It is an amenable number.

45309773981 is a deficient number, since it is larger than the sum of its proper divisors (653251).

45309773981 is an equidigital number, since it uses as much as digits as its factorization.

45309773981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653250.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 45309773981 in words is "forty-five billion, three hundred nine million, seven hundred seventy-three thousand, nine hundred eighty-one".