1641254180591 has 8 divisors (see below), whose sum is σ = 1714565887584. Its totient is φ = 1568105209440.

The previous prime is 1641254180581. The next prime is 1641254180593. The reversal of 1641254180591 is 1950814521461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641254180591 - 2²² = 1641249986287 is a prime.

It is a super-2 number, since 2×1641254180591² (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 (1641254180593) 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, 40663340 + ... + 40703681.

It is an arithmetic number, because the mean of its divisors is an integer number (214320735948).

Almost surely, 2^{1641254180591} is an apocalyptic number.

1641254180591 is a deficient number, since it is larger than the sum of its proper divisors (73311706993).

1641254180591 is an equidigital number, since it uses as much as digits as its factorization.

1641254180591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81367921.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 1641254180591 in words is "one trillion, six hundred forty-one billion, two hundred fifty-four million, one hundred eighty thousand, five hundred ninety-one".