15948980881 has 2 divisors, whose sum is σ = 15948980882. Its totient is φ = 15948980880.

The previous prime is 15948980863. The next prime is 15948980891. The reversal of 15948980881 is 18808984951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13261595281 + 2687385600 = 115159^2 + 51840^2 .

It is a cyclic number.

It is not a de Polignac number, because 15948980881 - 2¹¹ = 15948978833 is a prime.

It is a super-2 number, since 2×15948980881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15948980891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7974490440 + 7974490441.

It is an arithmetic number, because the mean of its divisors is an integer number (7974490441).

Almost surely, 2^15948980881 is an apocalyptic number.

It is an amenable number.

15948980881 is a deficient number, since it is larger than the sum of its proper divisors (1).

15948980881 is an equidigital number, since it uses as much as digits as its factorization.

15948980881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 61.

The spelling of 15948980881 in words is "fifteen billion, nine hundred forty-eight million, nine hundred eighty thousand, eight hundred eighty-one".