15405434412 has 48 divisors (see below), whose sum is σ = 36146420352. Its totient is φ = 5106591360.

The previous prime is 15405434393. The next prime is 15405434413. The reversal of 15405434412 is 21443450451.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15405434413) 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, 1764963 + ... + 1773669.

It is an arithmetic number, because the mean of its divisors is an integer number (753050424).

Almost surely, 2^15405434412 is an apocalyptic number.

15405434412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15405434412 is an abundant number, since it is smaller than the sum of its proper divisors (20740985940).

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

15405434412 is a wasteful number, since it uses less digits than its factorization.

15405434412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518 (or 9516 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 15405434412 its reverse (21443450451), we get a palindrome (36848884863).

The spelling of 15405434412 in words is "fifteen billion, four hundred five million, four hundred thirty-four thousand, four hundred twelve".