15320447945 has 16 divisors (see below), whose sum is σ = 20060187840. Its totient is φ = 11139739200.

The previous prime is 15320447921. The next prime is 15320447971. The reversal of 15320447945 is 54974402351.

It is not a de Polignac number, because 15320447945 - 2⁶ = 15320447881 is a prime.

It is a super-2 number, since 2×15320447945² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15320447896 and 15320447905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250715 + ... + 305775.

It is an arithmetic number, because the mean of its divisors is an integer number (1253761740).

Almost surely, 2^15320447945 is an apocalyptic number.

It is an amenable number.

15320447945 is a deficient number, since it is larger than the sum of its proper divisors (4739739895).

15320447945 is a wasteful number, since it uses less digits than its factorization.

15320447945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60136.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 15320447945 in words is "fifteen billion, three hundred twenty million, four hundred forty-seven thousand, nine hundred forty-five".