15493593121 has 2 divisors, whose sum is σ = 15493593122. Its totient is φ = 15493593120.

The previous prime is 15493593113. The next prime is 15493593131. The reversal of 15493593121 is 12139539451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14027086096 + 1466507025 = 118436^2 + 38295^2 .

It is a cyclic number.

It is not a de Polignac number, because 15493593121 - 2³ = 15493593113 is a prime.

It is not a weakly prime, because it can be changed into another prime (15493593131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7746796560 + 7746796561.

It is an arithmetic number, because the mean of its divisors is an integer number (7746796561).

Almost surely, 2^15493593121 is an apocalyptic number.

It is an amenable number.

15493593121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15493593121 is an equidigital number, since it uses as much as digits as its factorization.

15493593121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The spelling of 15493593121 in words is "fifteen billion, four hundred ninety-three million, five hundred ninety-three thousand, one hundred twenty-one".