45661801837 has 2 divisors, whose sum is σ = 45661801838. Its totient is φ = 45661801836.

The previous prime is 45661801771. The next prime is 45661801841. The reversal of 45661801837 is 73810816654.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44916020356 + 745781481 = 211934^2 + 27309^2 .

It is a cyclic number.

It is not a de Polignac number, because 45661801837 - 2²³ = 45653413229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45661801937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22830900918 + 22830900919.

It is an arithmetic number, because the mean of its divisors is an integer number (22830900919).

Almost surely, 2^45661801837 is an apocalyptic number.

It is an amenable number.

45661801837 is a deficient number, since it is larger than the sum of its proper divisors (1).

45661801837 is an equidigital number, since it uses as much as digits as its factorization.

45661801837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 45661801837 in words is "forty-five billion, six hundred sixty-one million, eight hundred one thousand, eight hundred thirty-seven".