15570854947 has 4 divisors (see below), whose sum is σ = 15722028400. Its totient is φ = 15419681496.

The previous prime is 15570854927. The next prime is 15570854969. The reversal of 15570854947 is 74945807551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15570854947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15570854917) 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, 75586572 + ... + 75586777.

It is an arithmetic number, because the mean of its divisors is an integer number (3930507100).

Almost surely, 2^15570854947 is an apocalyptic number.

15570854947 is a deficient number, since it is larger than the sum of its proper divisors (151173453).

15570854947 is a wasteful number, since it uses less digits than its factorization.

15570854947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151173452.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 15570854947 in words is "fifteen billion, five hundred seventy million, eight hundred fifty-four thousand, nine hundred forty-seven".