15485640912 has 600 divisors, whose sum is σ = 54864586656. Its totient is φ = 4200408576.

The previous prime is 15485640899. The next prime is 15485640979. The reversal of 15485640912 is 21904658451.

15485640912 is a `hidden beast` number, since 1 + 548 + 56 + 40 + 9 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 144725563 + ... + 144725669.

Almost surely, 2^15485640912 is an apocalyptic number.

15485640912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15485640912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27432293328).

15485640912 is an abundant number, since it is smaller than the sum of its proper divisors (39378945744).

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

15485640912 is a wasteful number, since it uses less digits than its factorization.

15485640912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 15485640912 in words is "fifteen billion, four hundred eighty-five million, six hundred forty thousand, nine hundred twelve".