15491025426496 has 21 divisors (see below), whose sum is σ = 30740066062671. Its totient is φ = 7745496969792.

The previous prime is 15491025426479. The next prime is 15491025426571. The reversal of 15491025426496 is 69462452019451.

The square root of 15491025426496 is 3935864.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15491025426496.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31240921 + ... + 31732903.

It is an arithmetic number, because the mean of its divisors is an integer number (1463812669651).

Almost surely, 2^{15491025426496} is an apocalyptic number.

15491025426496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15491025426496 is the 3935864-th square number.

It is an amenable number.

15491025426496 is a deficient number, since it is larger than the sum of its proper divisors (15249040636175).

15491025426496 is an frugal number, since it uses more digits than its factorization.

15491025426496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983978 (or 491985 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 15491025426496 in words is "fifteen trillion, four hundred ninety-one billion, twenty-five million, four hundred twenty-six thousand, four hundred ninety-six".