61085638810 has 48 divisors (see below), whose sum is σ = 129707412480. Its totient is φ = 20648654880.

The previous prime is 61085638769. The next prime is 61085638811. The reversal of 61085638810 is 1883658016.

It is a super-2 number, since 2×61085638810² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61085638811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 843130 + ... + 912709.

It is an arithmetic number, because the mean of its divisors is an integer number (2702237760).

Almost surely, 2^61085638810 is an apocalyptic number.

61085638810 is an abundant number, since it is smaller than the sum of its proper divisors (68621773670).

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

61085638810 is a wasteful number, since it uses less digits than its factorization.

61085638810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755931 (or 1755924 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 61085638810 in words is "sixty-one billion, eighty-five million, six hundred thirty-eight thousand, eight hundred ten".