45256641637 has 2 divisors, whose sum is σ = 45256641638. Its totient is φ = 45256641636.

The previous prime is 45256641631. The next prime is 45256641641. The reversal of 45256641637 is 73614665254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42535350081 + 2721291556 = 206241^2 + 52166^2 .

It is a cyclic number.

It is not a de Polignac number, because 45256641637 - 2¹⁵ = 45256608869 is a prime.

It is a super-2 number, since 2×45256641637² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45256641631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22628320818 + 22628320819.

It is an arithmetic number, because the mean of its divisors is an integer number (22628320819).

Almost surely, 2^45256641637 is an apocalyptic number.

It is an amenable number.

45256641637 is a deficient number, since it is larger than the sum of its proper divisors (1).

45256641637 is an equidigital number, since it uses as much as digits as its factorization.

45256641637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 49.

The spelling of 45256641637 in words is "forty-five billion, two hundred fifty-six million, six hundred forty-one thousand, six hundred thirty-seven".