15104149981 has 2 divisors, whose sum is σ = 15104149982. Its totient is φ = 15104149980.

The previous prime is 15104149969. The next prime is 15104150003. The reversal of 15104149981 is 18994140151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13937927481 + 1166222500 = 118059^2 + 34150^2 .

It is a cyclic number.

It is not a de Polignac number, because 15104149981 - 2²⁷ = 14969932253 is a prime.

It is a super-2 number, since 2×15104149981² (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 (15104140981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7552074990 + 7552074991.

It is an arithmetic number, because the mean of its divisors is an integer number (7552074991).

Almost surely, 2^15104149981 is an apocalyptic number.

It is an amenable number.

15104149981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15104149981 is an equidigital number, since it uses as much as digits as its factorization.

15104149981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 43.

The spelling of 15104149981 in words is "fifteen billion, one hundred four million, one hundred forty-nine thousand, nine hundred eighty-one".