247910979551 has 2 divisors, whose sum is σ = 247910979552. Its totient is φ = 247910979550.

The previous prime is 247910979521. The next prime is 247910979557. The reversal of 247910979551 is 155979019742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247910979551 - 2¹⁰ = 247910978527 is a prime.

It is a super-2 number, since 2×247910979551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247910979557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123955489775 + 123955489776.

It is an arithmetic number, because the mean of its divisors is an integer number (123955489776).

Almost surely, 2^247910979551 is an apocalyptic number.

247910979551 is a deficient number, since it is larger than the sum of its proper divisors (1).

247910979551 is an equidigital number, since it uses as much as digits as its factorization.

247910979551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7144200, while the sum is 59.

The spelling of 247910979551 in words is "two hundred forty-seven billion, nine hundred ten million, nine hundred seventy-nine thousand, five hundred fifty-one".