15825715481 has 8 divisors (see below), whose sum is σ = 16488900864. Its totient is φ = 15172072560.

The previous prime is 15825715393. The next prime is 15825715567. The reversal of 15825715481 is 18451752851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15825715481 - 2¹⁸ = 15825453337 is a prime.

It is a super-2 number, since 2×15825715481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15825715181) 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, 2382230 + ... + 2388863.

It is an arithmetic number, because the mean of its divisors is an integer number (2061112608).

Almost surely, 2^15825715481 is an apocalyptic number.

It is an amenable number.

15825715481 is a deficient number, since it is larger than the sum of its proper divisors (663185383).

15825715481 is a wasteful number, since it uses less digits than its factorization.

15825715481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771231.

The product of its digits is 448000, while the sum is 47.

The spelling of 15825715481 in words is "fifteen billion, eight hundred twenty-five million, seven hundred fifteen thousand, four hundred eighty-one".