15154340439649 has 2 divisors, whose sum is σ = 15154340439650. Its totient is φ = 15154340439648.

The previous prime is 15154340439629. The next prime is 15154340439757. The reversal of 15154340439649 is 94693404345151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9697350999249 + 5456989440400 = 3114057^2 + 2336020^2 .

It is a cyclic number.

It is not a de Polignac number, because 15154340439649 - 2²⁹ = 15153803568737 is a prime.

It is a super-2 number, since 2×15154340439649² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15154340439593 and 15154340439602.

It is not a weakly prime, because it can be changed into another prime (15154340439629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7577170219824 + 7577170219825.

It is an arithmetic number, because the mean of its divisors is an integer number (7577170219825).

Almost surely, 2^{15154340439649} is an apocalyptic number.

It is an amenable number.

15154340439649 is a deficient number, since it is larger than the sum of its proper divisors (1).

15154340439649 is an equidigital number, since it uses as much as digits as its factorization.

15154340439649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27993600, while the sum is 58.

The spelling of 15154340439649 in words is "fifteen trillion, one hundred fifty-four billion, three hundred forty million, four hundred thirty-nine thousand, six hundred forty-nine".