10001238555 has 64 divisors (see below), whose sum is σ = 20638540800. Its totient is φ = 4013022720.

The previous prime is 10001238553. The next prime is 10001238581. The reversal of 10001238555 is 55583210001.

It is not a de Polignac number, because 10001238555 - 2¹ = 10001238553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10001238553) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115800 + ... + 182789.

It is an arithmetic number, because the mean of its divisors is an integer number (322477200).

Almost surely, 2^10001238555 is an apocalyptic number.

10001238555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10001238555 is an abundant number, since it is smaller than the sum of its proper divisors (10637302245).

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

10001238555 is a wasteful number, since it uses less digits than its factorization.

10001238555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298644.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 10001238555 its reverse (55583210001), we get a palindrome (65584448556).

The spelling of 10001238555 in words is "ten billion, one million, two hundred thirty-eight thousand, five hundred fifty-five".