15091968901 has 2 divisors, whose sum is σ = 15091968902. Its totient is φ = 15091968900.

The previous prime is 15091968893. The next prime is 15091968919. The reversal of 15091968901 is 10986919051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14474496100 + 617472801 = 120310^2 + 24849^2 .

It is a cyclic number.

It is not a de Polignac number, because 15091968901 - 2³ = 15091968893 is a prime.

It is a super-2 number, since 2×15091968901² (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 (15091968971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7545984450 + 7545984451.

It is an arithmetic number, because the mean of its divisors is an integer number (7545984451).

Almost surely, 2^15091968901 is an apocalyptic number.

It is an amenable number.

15091968901 is a deficient number, since it is larger than the sum of its proper divisors (1).

15091968901 is an equidigital number, since it uses as much as digits as its factorization.

15091968901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 49.

The spelling of 15091968901 in words is "fifteen billion, ninety-one million, nine hundred sixty-eight thousand, nine hundred one".