15491082415 has 4 divisors (see below), whose sum is σ = 18589298904. Its totient is φ = 12392865928.

The previous prime is 15491082407. The next prime is 15491082419. The reversal of 15491082415 is 51428019451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51428019451 = 1447 ⋅35541133.

It is a cyclic number.

It is not a de Polignac number, because 15491082415 - 2³ = 15491082407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15491082419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549108237 + ... + 1549108246.

It is an arithmetic number, because the mean of its divisors is an integer number (4647324726).

Almost surely, 2^15491082415 is an apocalyptic number.

15491082415 is a deficient number, since it is larger than the sum of its proper divisors (3098216489).

15491082415 is an equidigital number, since it uses as much as digits as its factorization.

15491082415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098216488.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 15491082415 in words is "fifteen billion, four hundred ninety-one million, eighty-two thousand, four hundred fifteen".