45612172421 has 2 divisors, whose sum is σ = 45612172422. Its totient is φ = 45612172420.

The previous prime is 45612172381. The next prime is 45612172423. The reversal of 45612172421 is 12427121654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42135772900 + 3476399521 = 205270^2 + 58961^2 .

It is a cyclic number.

It is not a de Polignac number, because 45612172421 - 2¹⁸ = 45611910277 is a prime.

Together with 45612172423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45612172423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22806086210 + 22806086211.

It is an arithmetic number, because the mean of its divisors is an integer number (22806086211).

Almost surely, 2^45612172421 is an apocalyptic number.

It is an amenable number.

45612172421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45612172421 is an equidigital number, since it uses as much as digits as its factorization.

45612172421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The spelling of 45612172421 in words is "forty-five billion, six hundred twelve million, one hundred seventy-two thousand, four hundred twenty-one".