1621462396241 has 2 divisors, whose sum is σ = 1621462396242. Its totient is φ = 1621462396240.

The previous prime is 1621462396139. The next prime is 1621462396313. The reversal of 1621462396241 is 1426932641261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1376433436225 + 245028960016 = 1173215^2 + 495004^2 .

It is a cyclic number.

It is not a de Polignac number, because 1621462396241 - 2³⁸ = 1346584489297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1621462390241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810731198120 + 810731198121.

It is an arithmetic number, because the mean of its divisors is an integer number (810731198121).

Almost surely, 2^{1621462396241} is an apocalyptic number.

It is an amenable number.

1621462396241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621462396241 is an equidigital number, since it uses as much as digits as its factorization.

1621462396241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The spelling of 1621462396241 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-two million, three hundred ninety-six thousand, two hundred forty-one".