15551206242479 has 2 divisors, whose sum is σ = 15551206242480. Its totient is φ = 15551206242478.

The previous prime is 15551206242443. The next prime is 15551206242499. The reversal of 15551206242479 is 97424260215551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15551206242479 is a prime.

It is a super-2 number, since 2×15551206242479² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15551206242479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15551206242499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775603121239 + 7775603121240.

It is an arithmetic number, because the mean of its divisors is an integer number (7775603121240).

Almost surely, 2^{15551206242479} is an apocalyptic number.

15551206242479 is a deficient number, since it is larger than the sum of its proper divisors (1).

15551206242479 is an equidigital number, since it uses as much as digits as its factorization.

15551206242479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048000, while the sum is 53.

The spelling of 15551206242479 in words is "fifteen trillion, five hundred fifty-one billion, two hundred six million, two hundred forty-two thousand, four hundred seventy-nine".