61085810502 has 64 divisors (see below), whose sum is σ = 142983456000. Its totient is φ = 19277745984.

The previous prime is 61085810501. The next prime is 61085810503. The reversal of 61085810502 is 20501858016.

61085810502 is a `hidden beast` number, since 61 + 0 + 85 + 8 + 10 + 502 = 666.

It is an interprime number because it is at equal distance from previous prime (61085810501) and next prime (61085810503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61085810501) 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, 1632333 + ... + 1669335.

It is an arithmetic number, because the mean of its divisors is an integer number (2234116500).

Almost surely, 2^61085810502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61085810502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71491728000).

61085810502 is an abundant number, since it is smaller than the sum of its proper divisors (81897645498).

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

61085810502 is a wasteful number, since it uses less digits than its factorization.

61085810502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38642 (or 38636 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 61085810502 in words is "sixty-one billion, eighty-five million, eight hundred ten thousand, five hundred two".