53640631261 has 8 divisors (see below), whose sum is σ = 64530082880. Its totient is φ = 43557805728.

The previous prime is 53640631243. The next prime is 53640631273. The reversal of 53640631261 is 16213604635.

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 53640631261 - 2¹⁷ = 53640500189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53640631261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53640131261) 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, 201656376 + ... + 201656641.

It is an arithmetic number, because the mean of its divisors is an integer number (8066260360).

Almost surely, 2^53640631261 is an apocalyptic number.

It is an amenable number.

53640631261 is a deficient number, since it is larger than the sum of its proper divisors (10889451619).

53640631261 is a wasteful number, since it uses less digits than its factorization.

53640631261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403313043.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 53640631261 in words is "fifty-three billion, six hundred forty million, six hundred thirty-one thousand, two hundred sixty-one".