53645535631 has 4 divisors (see below), whose sum is σ = 56801155392. Its totient is φ = 50489915872.

The previous prime is 53645535583. The next prime is 53645535637. The reversal of 53645535631 is 13653554635.

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

It is a cyclic number.

It is not a de Polignac number, because 53645535631 - 2¹¹ = 53645533583 is a prime.

It is a super-2 number, since 2×53645535631² (a number of 22 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 (53645535637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577809855 + ... + 1577809888.

It is an arithmetic number, because the mean of its divisors is an integer number (14200288848).

Almost surely, 2^53645535631 is an apocalyptic number.

53645535631 is a deficient number, since it is larger than the sum of its proper divisors (3155619761).

53645535631 is a wasteful number, since it uses less digits than its factorization.

53645535631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155619760.

The product of its digits is 2430000, while the sum is 46.

The spelling of 53645535631 in words is "fifty-three billion, six hundred forty-five million, five hundred thirty-five thousand, six hundred thirty-one".