15945947670 has 32 divisors (see below), whose sum is σ = 38649195360. Its totient is φ = 4210150400.

The previous prime is 15945947663. The next prime is 15945947671. The reversal of 15945947670 is 7674954951.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15945947670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15945947671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628315 + ... + 2634374.

It is an arithmetic number, because the mean of its divisors is an integer number (1207787355).

Almost surely, 2^15945947670 is an apocalyptic number.

15945947670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15945947670 is an abundant number, since it is smaller than the sum of its proper divisors (22703247690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15945947670 is a wasteful number, since it uses less digits than its factorization.

15945947670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262800.

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 15945947670 in words is "fifteen billion, nine hundred forty-five million, nine hundred forty-seven thousand, six hundred seventy".