641154356354 has 4 divisors (see below), whose sum is σ = 961731534534. Its totient is φ = 320577178176.

The previous prime is 641154356347. The next prime is 641154356369. The reversal of 641154356354 is 453653451146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 636288596329 + 4865760025 = 797677^2 + 69755^2 .

It is a super-2 number, since 2×641154356354² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641154356299 and 641154356308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160288589087 + ... + 160288589090.

Almost surely, 2^641154356354 is an apocalyptic number.

641154356354 is a deficient number, since it is larger than the sum of its proper divisors (320577178180).

641154356354 is a wasteful number, since it uses less digits than its factorization.

641154356354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320577178179.

The product of its digits is 2592000, while the sum is 47.

The spelling of 641154356354 in words is "six hundred forty-one billion, one hundred fifty-four million, three hundred fifty-six thousand, three hundred fifty-four".