53929040561 has 4 divisors (see below), whose sum is σ = 58831680624. Its totient is φ = 49026400500.

The previous prime is 53929040537. The next prime is 53929040563. The reversal of 53929040561 is 16504092935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-53929040561 is a prime.

It is a super-4 number, since 4×53929040561⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53929040563) 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, 2451320015 + ... + 2451320036.

It is an arithmetic number, because the mean of its divisors is an integer number (14707920156).

Almost surely, 2^53929040561 is an apocalyptic number.

It is an amenable number.

53929040561 is a deficient number, since it is larger than the sum of its proper divisors (4902640063).

53929040561 is a wasteful number, since it uses less digits than its factorization.

53929040561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902640062.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 53929040561 in words is "fifty-three billion, nine hundred twenty-nine million, forty thousand, five hundred sixty-one".