15231566461 has 8 divisors (see below), whose sum is σ = 15653905344. Its totient is φ = 14811648480.

The previous prime is 15231566447. The next prime is 15231566473. The reversal of 15231566461 is 16466513251.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15231566461 - 2⁹ = 15231565949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15231566401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592465 + ... + 617638.

It is an arithmetic number, because the mean of its divisors is an integer number (1956738168).

Almost surely, 2^15231566461 is an apocalyptic number.

It is an amenable number.

15231566461 is a deficient number, since it is larger than the sum of its proper divisors (422338883).

15231566461 is a wasteful number, since it uses less digits than its factorization.

15231566461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210451.

The product of its digits is 129600, while the sum is 40.

The spelling of 15231566461 in words is "fifteen billion, two hundred thirty-one million, five hundred sixty-six thousand, four hundred sixty-one".