726264551 has 2 divisors, whose sum is σ = 726264552. Its totient is φ = 726264550.

The previous prime is 726264521. The next prime is 726264557. The reversal of 726264551 is 155462627.

It is a strong prime.

It is an emirp because it is prime and its reverse (155462627) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726264551 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726264557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363132275 + 363132276.

It is an arithmetic number, because the mean of its divisors is an integer number (363132276).

Almost surely, 2^726264551 is an apocalyptic number.

726264551 is a deficient number, since it is larger than the sum of its proper divisors (1).

726264551 is an equidigital number, since it uses as much as digits as its factorization.

726264551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 38.

The square root of 726264551 is about 26949.2959277232. The cubic root of 726264551 is about 898.8728898820.

It can be divided in two parts, 72626 and 4551, that added together give a palindrome (77177).

The spelling of 726264551 in words is "seven hundred twenty-six million, two hundred sixty-four thousand, five hundred fifty-one".