15973954608049 has 3 divisors (see below), whose sum is σ = 15973958604793. Its totient is φ = 15973950611306.

The previous prime is 15973954607987. The next prime is 15973954608089. The reversal of 15973954608049 is 94080645937951.

The square root of 15973954608049 is 3996743.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 15973954608049 - 2⁷ = 15973954607921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15973954608089) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1998372 + ... + 5995114.

Almost surely, 2^{15973954608049} is an apocalyptic number.

15973954608049 is the 3996743-rd square number.

15973954608049 is the 1998372-nd centered octagonal number.

It is an amenable number.

15973954608049 is a deficient number, since it is larger than the sum of its proper divisors (3996744).

15973954608049 is an frugal number, since it uses more digits than its factorization.

15973954608049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993486 (or 3996743 counting only the distinct ones).

The product of its (nonzero) digits is 293932800, while the sum is 70.

The spelling of 15973954608049 in words is "fifteen trillion, nine hundred seventy-three billion, nine hundred fifty-four million, six hundred eight thousand, forty-nine".