15119437981 has 2 divisors, whose sum is σ = 15119437982. Its totient is φ = 15119437980.

The previous prime is 15119437973. The next prime is 15119438023. The reversal of 15119437981 is 18973491151.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13959422500 + 1160015481 = 118150^2 + 34059^2 .

It is a cyclic number.

It is not a de Polignac number, because 15119437981 - 2³ = 15119437973 is a prime.

It is a super-2 number, since 2×15119437981² (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 (15119437901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7559718990 + 7559718991.

It is an arithmetic number, because the mean of its divisors is an integer number (7559718991).

Almost surely, 2^15119437981 is an apocalyptic number.

It is an amenable number.

15119437981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15119437981 is an equidigital number, since it uses as much as digits as its factorization.

15119437981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 49.

The spelling of 15119437981 in words is "fifteen billion, one hundred nineteen million, four hundred thirty-seven thousand, nine hundred eighty-one".