15425440992 has 144 divisors (see below), whose sum is σ = 47506389840. Its totient is φ = 4719568896.

The previous prime is 15425440991. The next prime is 15425440993. The reversal of 15425440992 is 29904452451.

15425440992 is a `hidden beast` number, since 15 + 4 + 2 + 544 + 0 + 9 + 92 = 666.

It is an interprime number because it is at equal distance from previous prime (15425440991) and next prime (15425440993).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15425440991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 658668 + ... + 681684.

It is an arithmetic number, because the mean of its divisors is an integer number (329905485).

Almost surely, 2^15425440992 is an apocalyptic number.

15425440992 is a gapful number since it is divisible by the number (12) 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 15425440992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23753194920).

15425440992 is an abundant number, since it is smaller than the sum of its proper divisors (32080948848).

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

15425440992 is a wasteful number, since it uses less digits than its factorization.

15425440992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23225 (or 23214 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 15425440992 in words is "fifteen billion, four hundred twenty-five million, four hundred forty thousand, nine hundred ninety-two".