11621751539 has 2 divisors, whose sum is σ = 11621751540. Its totient is φ = 11621751538.

The previous prime is 11621751521. The next prime is 11621751551. The reversal of 11621751539 is 93515712611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11621751539 - 2¹² = 11621747443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11621751496 and 11621751505.

It is not a weakly prime, because it can be changed into another prime (11621754539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810875769 + 5810875770.

It is an arithmetic number, because the mean of its divisors is an integer number (5810875770).

Almost surely, 2^11621751539 is an apocalyptic number.

11621751539 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621751539 is an equidigital number, since it uses as much as digits as its factorization.

11621751539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 41.

The spelling of 11621751539 in words is "eleven billion, six hundred twenty-one million, seven hundred fifty-one thousand, five hundred thirty-nine".