15438040086 has 64 divisors (see below), whose sum is σ = 36239892480. Its totient is φ = 4292804640.

The previous prime is 15438040081. The next prime is 15438040157. The reversal of 15438040086 is 68004083451.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15438040081) 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, 331501 + ... + 375191.

It is an arithmetic number, because the mean of its divisors is an integer number (566248320).

Almost surely, 2^15438040086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15438040086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18119946240).

15438040086 is an abundant number, since it is smaller than the sum of its proper divisors (20801852394).

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

15438040086 is a wasteful number, since it uses less digits than its factorization.

15438040086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43929.

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 15438040086 in words is "fifteen billion, four hundred thirty-eight million, forty thousand, eighty-six".