15548279261 has 2 divisors, whose sum is σ = 15548279262. Its totient is φ = 15548279260.

The previous prime is 15548279251. The next prime is 15548279267. The reversal of 15548279261 is 16297284551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8806884025 + 6741395236 = 93845^2 + 82106^2 .

It is a cyclic number.

It is not a de Polignac number, because 15548279261 - 2¹⁰ = 15548278237 is a prime.

It is a super-2 number, since 2×15548279261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15548279267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7774139630 + 7774139631.

It is an arithmetic number, because the mean of its divisors is an integer number (7774139631).

Almost surely, 2^15548279261 is an apocalyptic number.

It is an amenable number.

15548279261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15548279261 is an equidigital number, since it uses as much as digits as its factorization.

15548279261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The spelling of 15548279261 in words is "fifteen billion, five hundred forty-eight million, two hundred seventy-nine thousand, two hundred sixty-one".