11621385375531 has 8 divisors (see below), whose sum is σ = 16406661706704. Its totient is φ = 7291849647360.

The previous prime is 11621385375517. The next prime is 11621385375571. The reversal of 11621385375531 is 13557358312611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11621385375531 - 2¹⁷ = 11621385244459 is a prime.

It is a super-2 number, since 2×11621385375531² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 227870301481 = 11621385375531 / (1 + 1 + 6 + 2 + 1 + 3 + 8 + 5 + 3 + 7 + 5 + 5 + 3 + 1).

It is not an unprimeable number, because it can be changed into a prime (11621385375571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113935150690 + ... + 113935150791.

It is an arithmetic number, because the mean of its divisors is an integer number (2050832713338).

Almost surely, 2^{11621385375531} is an apocalyptic number.

11621385375531 is a deficient number, since it is larger than the sum of its proper divisors (4785276331173).

11621385375531 is a wasteful number, since it uses less digits than its factorization.

11621385375531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227870301501.

The product of its digits is 2268000, while the sum is 51.

The spelling of 11621385375531 in words is "eleven trillion, six hundred twenty-one billion, three hundred eighty-five million, three hundred seventy-five thousand, five hundred thirty-one".