61842065896 has 72 divisors (see below), whose sum is σ = 128066421330. Its totient is φ = 27973810176.

The previous prime is 61842065867. The next prime is 61842065941. The reversal of 61842065896 is 69856024816.

It can be written as a sum of positive squares in 9 ways, for example, as 15782896900 + 46059168996 = 125630^2 + 214614^2 .

It is a super-2 number, since 2×61842065896² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66567960 + ... + 66568888.

Almost surely, 2^61842065896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61842065896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64033210665).

61842065896 is an abundant number, since it is smaller than the sum of its proper divisors (66224355434).

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

61842065896 is an equidigital number, since it uses as much as digits as its factorization.

61842065896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 61842065896 in words is "sixty-one billion, eight hundred forty-two million, sixty-five thousand, eight hundred ninety-six".