1085551057631 has 16 divisors (see below), whose sum is σ = 1108440518688. Its totient is φ = 1062752870400.

The previous prime is 1085551057627. The next prime is 1085551057637. The reversal of 1085551057631 is 1367501555801.

It is a cyclic number.

It is not a de Polignac number, because 1085551057631 - 2² = 1085551057627 is a prime.

It is a super-2 number, since 2×1085551057631² (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 (1085551057637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60700811 + ... + 60718691.

It is an arithmetic number, because the mean of its divisors is an integer number (69277532418).

Almost surely, 2^{1085551057631} is an apocalyptic number.

1085551057631 is a deficient number, since it is larger than the sum of its proper divisors (22889461057).

1085551057631 is a wasteful number, since it uses less digits than its factorization.

1085551057631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20362.

The product of its (nonzero) digits is 630000, while the sum is 47.

The spelling of 1085551057631 in words is "one trillion, eighty-five billion, five hundred fifty-one million, fifty-seven thousand, six hundred thirty-one".