15478444212 has 96 divisors (see below), whose sum is σ = 46480809984. Its totient is φ = 3890678400.

The previous prime is 15478444169. The next prime is 15478444213. The reversal of 15478444212 is 21244487451.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15478444213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241543 + ... + 298830.

It is an arithmetic number, because the mean of its divisors is an integer number (484175104).

Almost surely, 2^15478444212 is an apocalyptic number.

15478444212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15478444212 is an abundant number, since it is smaller than the sum of its proper divisors (31002365772).

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

15478444212 is a wasteful number, since it uses less digits than its factorization.

15478444212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540429 (or 540427 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The spelling of 15478444212 in words is "fifteen billion, four hundred seventy-eight million, four hundred forty-four thousand, two hundred twelve".