61031022309 has 12 divisors (see below), whose sum is σ = 89064746316. Its totient is φ = 40267890432.

The previous prime is 61031022287. The next prime is 61031022347. The reversal of 61031022309 is 90322013016.

61031022309 is a `hidden beast` number, since 610 + 3 + 10 + 2 + 2 + 30 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10358761284 + 50672261025 = 101778^2 + 225105^2 .

It is not a de Polignac number, because 61031022309 - 2⁵ = 61031022277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61031022109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34953894 + ... + 34955639.

It is an arithmetic number, because the mean of its divisors is an integer number (7422062193).

Almost surely, 2^61031022309 is an apocalyptic number.

It is an amenable number.

61031022309 is a deficient number, since it is larger than the sum of its proper divisors (28033724007).

61031022309 is a wasteful number, since it uses less digits than its factorization.

61031022309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69909636 (or 69909633 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 61031022309 in words is "sixty-one billion, thirty-one million, twenty-two thousand, three hundred nine".