11653531120 has 80 divisors (see below), whose sum is σ = 33780123648. Its totient is φ = 3632267520.

The previous prime is 11653531081. The next prime is 11653531151. The reversal of 11653531120 is 2113535611.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939744 + ... + 952063.

Almost surely, 2^11653531120 is an apocalyptic number.

11653531120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11653531120 is an abundant number, since it is smaller than the sum of its proper divisors (22126592528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11653531120 is a wasteful number, since it uses less digits than its factorization.

11653531120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891838 (or 1891832 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 11653531120 in words is "eleven billion, six hundred fifty-three million, five hundred thirty-one thousand, one hundred twenty".