11651521063 has 32 divisors (see below), whose sum is σ = 14608702080. Its totient is φ = 9047808000.

The previous prime is 11651521051. The next prime is 11651521073. The reversal of 11651521063 is 36012515611.

It is a happy number.

It is not a de Polignac number, because 11651521063 - 2³³ = 3061586471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11651521073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1104313 + ... + 1114813.

It is an arithmetic number, because the mean of its divisors is an integer number (456521940).

Almost surely, 2^11651521063 is an apocalyptic number.

11651521063 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11651521063 is a deficient number, since it is larger than the sum of its proper divisors (2957181017).

11651521063 is a wasteful number, since it uses less digits than its factorization.

11651521063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10747.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 11651521063 in words is "eleven billion, six hundred fifty-one million, five hundred twenty-one thousand, sixty-three".