1010500005991 has 16 divisors (see below), whose sum is σ = 1222874604864. Its totient is φ = 815136827904.

The previous prime is 1010500005973. The next prime is 1010500006007. The reversal of 1010500005991 is 1995000050101.

It is not a de Polignac number, because 1010500005991 - 2²¹ = 1010497908839 is a prime.

It is a super-2 number, since 2×1010500005991² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010500005971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1476121 + ... + 2049373.

It is an arithmetic number, because the mean of its divisors is an integer number (76429662804).

Almost surely, 2^{1010500005991} is an apocalyptic number.

1010500005991 is a deficient number, since it is larger than the sum of its proper divisors (212374598873).

1010500005991 is a wasteful number, since it uses less digits than its factorization.

1010500005991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588090.

The product of its (nonzero) digits is 2025, while the sum is 31.

The spelling of 1010500005991 in words is "one trillion, ten billion, five hundred million, five thousand, nine hundred ninety-one".