635641131152543 has 16 divisors (see below), whose sum is σ = 676045247787360. Its totient is φ = 595573465651200.

The previous prime is 635641131152537. The next prime is 635641131152551. The reversal of 635641131152543 is 345251131146536.

It is not a de Polignac number, because 635641131152543 - 2¹⁶ = 635641131087007 is a prime.

It is a super-2 number, since 2×635641131152543² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 635641131152491 and 635641131152500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635641131154543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12801773 + ... + 37883606.

It is an arithmetic number, because the mean of its divisors is an integer number (42252827986710).

Almost surely, 2^{635641131152543} is an apocalyptic number.

635641131152543 is a deficient number, since it is larger than the sum of its proper divisors (40404116634817).

635641131152543 is a wasteful number, since it uses less digits than its factorization.

635641131152543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50688698.

The product of its digits is 3888000, while the sum is 50.

The spelling of 635641131152543 in words is "six hundred thirty-five trillion, six hundred forty-one billion, one hundred thirty-one million, one hundred fifty-two thousand, five hundred forty-three".