15467871561 has 4 divisors (see below), whose sum is σ = 20623828752. Its totient is φ = 10311914372.

The previous prime is 15467871553. The next prime is 15467871581. The reversal of 15467871561 is 16517876451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16517876451 = 3 ⋅5505958817.

It is a cyclic number.

It is not a de Polignac number, because 15467871561 - 2³ = 15467871553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15467871581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2577978591 + ... + 2577978596.

It is an arithmetic number, because the mean of its divisors is an integer number (5155957188).

Almost surely, 2^15467871561 is an apocalyptic number.

It is an amenable number.

15467871561 is a deficient number, since it is larger than the sum of its proper divisors (5155957191).

15467871561 is an equidigital number, since it uses as much as digits as its factorization.

15467871561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155957190.

The product of its digits is 1411200, while the sum is 51.

The spelling of 15467871561 in words is "fifteen billion, four hundred sixty-seven million, eight hundred seventy-one thousand, five hundred sixty-one".