11501917451 has 2 divisors, whose sum is σ = 11501917452. Its totient is φ = 11501917450.

The previous prime is 11501917397. The next prime is 11501917481. The reversal of 11501917451 is 15471910511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11501917451 is a prime.

It is not a weakly prime, because it can be changed into another prime (11501917481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750958725 + 5750958726.

It is an arithmetic number, because the mean of its divisors is an integer number (5750958726).

Almost surely, 2^11501917451 is an apocalyptic number.

11501917451 is a deficient number, since it is larger than the sum of its proper divisors (1).

11501917451 is an equidigital number, since it uses as much as digits as its factorization.

11501917451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 35.

The spelling of 11501917451 in words is "eleven billion, five hundred one million, nine hundred seventeen thousand, four hundred fifty-one".