104161899520 has 352 divisors, whose sum is σ = 315547964928. Its totient is φ = 32146194432.

The previous prime is 104161899511. The next prime is 104161899529. The reversal of 104161899520 is 25998161401.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (104161899511) and next prime (104161899529).

It is a super-2 number, since 2×104161899520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104161899529) 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, 14009724 + ... + 14017156.

Almost surely, 2^104161899520 is an apocalyptic number.

104161899520 is a gapful number since it is divisible by the number (10) 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 104161899520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157773982464).

104161899520 is an abundant number, since it is smaller than the sum of its proper divisors (211386065408).

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

104161899520 is a wasteful number, since it uses less digits than its factorization.

104161899520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7505 (or 7487 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 104161899520 in words is "one hundred four billion, one hundred sixty-one million, eight hundred ninety-nine thousand, five hundred twenty".