1641326431157 has 8 divisors (see below), whose sum is σ = 1896878059200. Its totient is φ = 1391043909024.

The previous prime is 1641326431111. The next prime is 1641326431159. The reversal of 1641326431157 is 7511346231461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1641326431157 - 2²⁰ = 1641325382581 is a prime.

It is a super-2 number, since 2×1641326431157² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641326431159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1317275807 + ... + 1317277052.

It is an arithmetic number, because the mean of its divisors is an integer number (237109757400).

Almost surely, 2^{1641326431157} is an apocalyptic number.

It is an amenable number.

1641326431157 is a deficient number, since it is larger than the sum of its proper divisors (255551628043).

1641326431157 is an equidigital number, since it uses as much as digits as its factorization.

1641326431157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634552955.

The product of its digits is 362880, while the sum is 44.

The spelling of 1641326431157 in words is "one trillion, six hundred forty-one billion, three hundred twenty-six million, four hundred thirty-one thousand, one hundred fifty-seven".