15516674252641 has 27 divisors (see below), whose sum is σ = 16612512871539. Its totient is φ = 14490166893888.

The previous prime is 15516674252603. The next prime is 15516674252669. The reversal of 15516674252641 is 14625247661551.

The square root of 15516674252641 is 3939121.

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

It can be written as a sum of positive squares in only one way, i.e., 12080455733025 + 3436218519616 = 3475695^2 + 1853704^2 .

It is not a de Polignac number, because 15516674252641 - 2⁹ = 15516674252129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15516674252941) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9308142090 + ... + 9308143756.

Almost surely, 2^{15516674252641} is an apocalyptic number.

15516674252641 is the 3939121-st square number.

15516674252641 is the 1969561-st centered octagonal number.

It is an amenable number.

15516674252641 is a deficient number, since it is larger than the sum of its proper divisors (1095838618898).

15516674252641 is an frugal number, since it uses more digits than its factorization.

15516674252641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646 (or 1823 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 55.

The spelling of 15516674252641 in words is "fifteen trillion, five hundred sixteen billion, six hundred seventy-four million, two hundred fifty-two thousand, six hundred forty-one".