249615559951 has 2 divisors, whose sum is σ = 249615559952. Its totient is φ = 249615559950.

The previous prime is 249615559909. The next prime is 249615559993. The reversal of 249615559951 is 159955516942.

It is a balanced prime because it is at equal distance from previous prime (249615559909) and next prime (249615559993).

It is a cyclic number.

It is not a de Polignac number, because 249615559951 - 2²⁹ = 249078689039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249615559951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249615559901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124807779975 + 124807779976.

It is an arithmetic number, because the mean of its divisors is an integer number (124807779976).

Almost surely, 2^249615559951 is an apocalyptic number.

249615559951 is a deficient number, since it is larger than the sum of its proper divisors (1).

249615559951 is an equidigital number, since it uses as much as digits as its factorization.

249615559951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870000, while the sum is 61.

The spelling of 249615559951 in words is "two hundred forty-nine billion, six hundred fifteen million, five hundred fifty-nine thousand, nine hundred fifty-one".