15479123220 has 576 divisors, whose sum is σ = 57038929920. Its totient is φ = 3454617600.

The previous prime is 15479123171. The next prime is 15479123249. The reversal of 15479123220 is 2232197451.

15479123220 is a `hidden beast` number, since 1 + 547 + 91 + 2 + 3 + 2 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 121882797 + ... + 121882923.

It is an arithmetic number, because the mean of its divisors is an integer number (99025920).

Almost surely, 2^15479123220 is an apocalyptic number.

15479123220 is a gapful number since it is divisible by the number (10) 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 15479123220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28519464960).

15479123220 is an abundant number, since it is smaller than the sum of its proper divisors (41559806700).

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

15479123220 is a wasteful number, since it uses less digits than its factorization.

15479123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 15479123220 in words is "fifteen billion, four hundred seventy-nine million, one hundred twenty-three thousand, two hundred twenty".