61050100085 has 32 divisors (see below), whose sum is σ = 83821983840. Its totient is φ = 42352063488.

The previous prime is 61050100073. The next prime is 61050100087. The reversal of 61050100085 is 58000105016.

It can be written as a sum of positive squares in 16 ways, for example, as 28682132164 + 32367967921 = 169358^2 + 179911^2 .

It is a cyclic number.

It is not a de Polignac number, because 61050100085 - 2¹⁴ = 61050083701 is a prime.

It is a super-2 number, since 2×61050100085² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61050100087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367922 + ... + 507411.

It is an arithmetic number, because the mean of its divisors is an integer number (2619436995).

Almost surely, 2^61050100085 is an apocalyptic number.

61050100085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61050100085 is a deficient number, since it is larger than the sum of its proper divisors (22771883755).

61050100085 is a wasteful number, since it uses less digits than its factorization.

61050100085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875417.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 61050100085 in words is "sixty-one billion, fifty million, one hundred thousand, eighty-five".