15520472947 has 8 divisors (see below), whose sum is σ = 17738653536. Its totient is φ = 13302534912.

The previous prime is 15520472941. The next prime is 15520472951. The reversal of 15520472947 is 74927402551.

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 15520472947 - 2⁷ = 15520472819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15520472897 and 15520472906.

It is not an unprimeable number, because it can be changed into a prime (15520472941) 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, 107613 + ... + 206449.

It is an arithmetic number, because the mean of its divisors is an integer number (2217331692).

Almost surely, 2^15520472947 is an apocalyptic number.

15520472947 is a deficient number, since it is larger than the sum of its proper divisors (2218180589).

15520472947 is an equidigital number, since it uses as much as digits as its factorization.

15520472947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121277.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 15520472947 in words is "fifteen billion, five hundred twenty million, four hundred seventy-two thousand, nine hundred forty-seven".