11621407575 has 24 divisors (see below), whose sum is σ = 19457286400. Its totient is φ = 6119624160.

The previous prime is 11621407529. The next prime is 11621407579. The reversal of 11621407575 is 57570412611.

It is not a de Polignac number, because 11621407575 - 2¹⁰ = 11621406551 is a prime.

It is a super-2 number, since 2×11621407575² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621407579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 974785 + ... + 986634.

Almost surely, 2^11621407575 is an apocalyptic number.

11621407575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11621407575 is a deficient number, since it is larger than the sum of its proper divisors (7835878825).

11621407575 is a wasteful number, since it uses less digits than its factorization.

11621407575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961511 (or 1961506 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 11621407575 in words is "eleven billion, six hundred twenty-one million, four hundred seven thousand, five hundred seventy-five".