23551541551 has 2 divisors, whose sum is σ = 23551541552. Its totient is φ = 23551541550.

The previous prime is 23551541539. The next prime is 23551541621. The reversal of 23551541551 is 15514515532.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23551541551 - 2¹³ = 23551533359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23551541551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23551541521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11775770775 + 11775770776.

It is an arithmetic number, because the mean of its divisors is an integer number (11775770776).

Almost surely, 2^23551541551 is an apocalyptic number.

23551541551 is a deficient number, since it is larger than the sum of its proper divisors (1).

23551541551 is an equidigital number, since it uses as much as digits as its factorization.

23551541551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75000, while the sum is 37.

The spelling of 23551541551 in words is "twenty-three billion, five hundred fifty-one million, five hundred forty-one thousand, five hundred fifty-one".