45177207821 has 24 divisors (see below), whose sum is σ = 50265908280. Its totient is φ = 40458756096.

The previous prime is 45177207793. The next prime is 45177207827. The reversal of 45177207821 is 12870277154.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 577681225 + 44599526596 = 24035^2 + 211186^2 .

It is not a de Polignac number, because 45177207821 - 2¹⁰ = 45177206797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45177207827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1722635 + ... + 1748663.

It is an arithmetic number, because the mean of its divisors is an integer number (2094412845).

Almost surely, 2^45177207821 is an apocalyptic number.

It is an amenable number.

45177207821 is a deficient number, since it is larger than the sum of its proper divisors (5088700459).

45177207821 is a wasteful number, since it uses less digits than its factorization.

45177207821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26285 (or 26262 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 45177207821 in words is "forty-five billion, one hundred seventy-seven million, two hundred seven thousand, eight hundred twenty-one".