18491497629696 has 1728 divisors, whose sum is σ = 71782230723840. Its totient is φ = 4461617479680.

The previous prime is 18491497629673. The next prime is 18491497629719. The reversal of 18491497629696 is 69692679419481.

18491497629696 is a `hidden beast` number, since 1 + 8 + 4 + 9 + 1 + 497 + 62 + 9 + 69 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (18491497629673) and next prime (18491497629719).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 17935496701 + ... + 17935497731.

It is an arithmetic number, because the mean of its divisors is an integer number (41540642780).

Almost surely, 2^{18491497629696} is an apocalyptic number.

18491497629696 is a gapful number since it is divisible by the number (16) 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 18491497629696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35891115361920).

18491497629696 is an abundant number, since it is smaller than the sum of its proper divisors (53290733094144).

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

18491497629696 is a wasteful number, since it uses less digits than its factorization.

18491497629696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1110 counting only the distinct ones).

The product of its digits is 2539579392, while the sum is 81.

The spelling of 18491497629696 in words is "eighteen trillion, four hundred ninety-one billion, four hundred ninety-seven million, six hundred twenty-nine thousand, six hundred ninety-six".