18617061030491 has 32 divisors (see below), whose sum is σ = 23226968056320. Its totient is φ = 14496750028800.

The previous prime is 18617061030481. The next prime is 18617061030497. The reversal of 18617061030491 is 19403016071681.

It is a cyclic number.

It is not a de Polignac number, because 18617061030491 - 2⁶ = 18617061030427 is a prime.

It is a super-2 number, since 2×18617061030491² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18617061030497) 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, 863128955 + ... + 863150523.

It is an arithmetic number, because the mean of its divisors is an integer number (725842751760).

Almost surely, 2^{18617061030491} is an apocalyptic number.

18617061030491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18617061030491 is a deficient number, since it is larger than the sum of its proper divisors (4609907025829).

18617061030491 is a wasteful number, since it uses less digits than its factorization.

18617061030491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28835.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 18617061030491 in words is "eighteen trillion, six hundred seventeen billion, sixty-one million, thirty thousand, four hundred ninety-one".