10401815500 has 144 divisors (see below), whose sum is σ = 24512289984. Its totient is φ = 3842380800.

The previous prime is 10401815491. The next prime is 10401815509. The reversal of 10401815500 is 551810401.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10401815491) and next prime (10401815509).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (10401815509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95429446 + ... + 95429554.

It is an arithmetic number, because the mean of its divisors is an integer number (170224236).

Almost surely, 2^10401815500 is an apocalyptic number.

10401815500 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 10401815500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12256144992).

10401815500 is an abundant number, since it is smaller than the sum of its proper divisors (14110474484).

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

10401815500 is a wasteful number, since it uses less digits than its factorization.

10401815500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 10401815500 in words is "ten billion, four hundred one million, eight hundred fifteen thousand, five hundred".