1632137656921 has 2 divisors, whose sum is σ = 1632137656922. Its totient is φ = 1632137656920.

The previous prime is 1632137656913. The next prime is 1632137656967. The reversal of 1632137656921 is 1296567312361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881382992400 + 750754664521 = 938820^2 + 866461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1632137656921 - 2³ = 1632137656913 is a prime.

It is a super-2 number, since 2×1632137656921² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1632137653921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 816068828460 + 816068828461.

It is an arithmetic number, because the mean of its divisors is an integer number (816068828461).

Almost surely, 2^{1632137656921} is an apocalyptic number.

It is an amenable number.

1632137656921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1632137656921 is an equidigital number, since it uses as much as digits as its factorization.

1632137656921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 52.

The spelling of 1632137656921 in words is "one trillion, six hundred thirty-two billion, one hundred thirty-seven million, six hundred fifty-six thousand, nine hundred twenty-one".