105000155720 has 32 divisors (see below), whose sum is σ = 236429582400. Its totient is φ = 41968198848.

The previous prime is 105000155719. The next prime is 105000155761. The reversal of 105000155720 is 27551000501.

It is a happy number.

It is a super-2 number, since 2×105000155720² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105000155720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942314 + ... + 1047833.

It is an arithmetic number, because the mean of its divisors is an integer number (7388424450).

Almost surely, 2^105000155720 is an apocalyptic number.

105000155720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105000155720 is an abundant number, since it is smaller than the sum of its proper divisors (131429426680).

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

105000155720 is a wasteful number, since it uses less digits than its factorization.

105000155720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991477 (or 1991473 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The spelling of 105000155720 in words is "one hundred five billion, one hundred fifty-five thousand, seven hundred twenty".