371633854021 has 2 divisors, whose sum is σ = 371633854022. Its totient is φ = 371633854020.

The previous prime is 371633854003. The next prime is 371633854027. The reversal of 371633854021 is 120458336173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333836661796 + 37797192225 = 577786^2 + 194415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-371633854021 is a prime.

It is a super-2 number, since 2×371633854021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (371633854027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185816927010 + 185816927011.

It is an arithmetic number, because the mean of its divisors is an integer number (185816927011).

Almost surely, 2^371633854021 is an apocalyptic number.

It is an amenable number.

371633854021 is a deficient number, since it is larger than the sum of its proper divisors (1).

371633854021 is an equidigital number, since it uses as much as digits as its factorization.

371633854021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 371633854021 in words is "three hundred seventy-one billion, six hundred thirty-three million, eight hundred fifty-four thousand, twenty-one".