15961423438 has 16 divisors (see below), whose sum is σ = 24575690304. Its totient is φ = 7771251040.

The previous prime is 15961423433. The next prime is 15961423463. The reversal of 15961423438 is 83432416951.

It is a happy number.

It is a super-3 number, since 3×15961423438³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15961423433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412453 + ... + 449488.

It is an arithmetic number, because the mean of its divisors is an integer number (1535980644).

Almost surely, 2^15961423438 is an apocalyptic number.

15961423438 is a deficient number, since it is larger than the sum of its proper divisors (8614266866).

15961423438 is a wasteful number, since it uses less digits than its factorization.

15961423438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862187.

The product of its digits is 622080, while the sum is 46.

The spelling of 15961423438 in words is "fifteen billion, nine hundred sixty-one million, four hundred twenty-three thousand, four hundred thirty-eight".