11601561053 has 4 divisors (see below), whose sum is σ = 11603175360. Its totient is φ = 11599946748.

The previous prime is 11601561029. The next prime is 11601561067. The reversal of 11601561053 is 35016510611.

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 cyclic number.

It is not a de Polignac number, because 11601561053 - 2²² = 11597366749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601563053) 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, 796325 + ... + 810762.

It is an arithmetic number, because the mean of its divisors is an integer number (2900793840).

Almost surely, 2^11601561053 is an apocalyptic number.

It is an amenable number.

11601561053 is a deficient number, since it is larger than the sum of its proper divisors (1614307).

11601561053 is an equidigital number, since it uses as much as digits as its factorization.

11601561053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614306.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 11601561053 in words is "eleven billion, six hundred one million, five hundred sixty-one thousand, fifty-three".