15544740851 has 2 divisors, whose sum is σ = 15544740852. Its totient is φ = 15544740850.

The previous prime is 15544740833. The next prime is 15544740853. The reversal of 15544740851 is 15804744551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15544740851 - 2²² = 15540546547 is a prime.

Together with 15544740853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15544740853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7772370425 + 7772370426.

It is an arithmetic number, because the mean of its divisors is an integer number (7772370426).

Almost surely, 2^15544740851 is an apocalyptic number.

15544740851 is a deficient number, since it is larger than the sum of its proper divisors (1).

15544740851 is an equidigital number, since it uses as much as digits as its factorization.

15544740851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448000, while the sum is 44.

The spelling of 15544740851 in words is "fifteen billion, five hundred forty-four million, seven hundred forty thousand, eight hundred fifty-one".