15712046640 has 60 divisors (see below), whose sum is σ = 52766292384. Its totient is φ = 4189878912.

The previous prime is 15712046627. The next prime is 15712046641. The reversal of 15712046640 is 4664021751.

15712046640 is a `hidden beast` number, since 1 + 5 + 7 + 1 + 2 + 0 + 4 + 6 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 15712046595 and 15712046604.

It is not an unprimeable number, because it can be changed into a prime (15712046641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10910424 + ... + 10911863.

Almost surely, 2^15712046640 is an apocalyptic number.

15712046640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15712046640 is an abundant number, since it is smaller than the sum of its proper divisors (37054245744).

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

15712046640 is a wasteful number, since it uses less digits than its factorization.

15712046640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21822306 (or 21822297 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 15712046640 in words is "fifteen billion, seven hundred twelve million, forty-six thousand, six hundred forty".