373680881521 has 2 divisors, whose sum is σ = 373680881522. Its totient is φ = 373680881520.

The previous prime is 373680881507. The next prime is 373680881543. The reversal of 373680881521 is 125188086373.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197313640000 + 176367241521 = 444200^2 + 419961^2 .

It is a cyclic number.

It is not a de Polignac number, because 373680881521 - 2⁵ = 373680881489 is a prime.

It is not a weakly prime, because it can be changed into another prime (373680881221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186840440760 + 186840440761.

It is an arithmetic number, because the mean of its divisors is an integer number (186840440761).

Almost surely, 2^373680881521 is an apocalyptic number.

It is an amenable number.

373680881521 is a deficient number, since it is larger than the sum of its proper divisors (1).

373680881521 is an equidigital number, since it uses as much as digits as its factorization.

373680881521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 373680881521 in words is "three hundred seventy-three billion, six hundred eighty million, eight hundred eighty-one thousand, five hundred twenty-one".