1001555105115 has 64 divisors (see below), whose sum is σ = 1792158796800. Its totient is φ = 475393411584.

The previous prime is 1001555105099. The next prime is 1001555105149. The reversal of 1001555105115 is 5115015551001.

It is a happy number.

1001555105115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1001555105115 - 2⁴ = 1001555105099 is a prime.

It is a super-2 number, since 2×1001555105115² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1331767 + ... + 1943376.

It is an arithmetic number, because the mean of its divisors is an integer number (28002481200).

Almost surely, 2^{1001555105115} is an apocalyptic number.

1001555105115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001555105115 is a deficient number, since it is larger than the sum of its proper divisors (790603691685).

1001555105115 is a wasteful number, since it uses less digits than its factorization.

1001555105115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275236.

The product of its (nonzero) digits is 3125, while the sum is 30.

The spelling of 1001555105115 in words is "one trillion, one billion, five hundred fifty-five million, one hundred five thousand, one hundred fifteen".