61850785860 has 144 divisors (see below), whose sum is σ = 190961971200. Its totient is φ = 16201366272.

The previous prime is 61850785837. The next prime is 61850785949. The reversal of 61850785860 is 6858705816.

61850785860 is a `hidden beast` number, since 6 + 1 + 8 + 50 + 7 + 8 + 586 + 0 = 666.

It is a super-2 number, since 2×61850785860² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61850785797 and 61850785806.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2790301 + ... + 2812379.

It is an arithmetic number, because the mean of its divisors is an integer number (1326124800).

Almost surely, 2^61850785860 is an apocalyptic number.

61850785860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61850785860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95480985600).

61850785860 is an abundant number, since it is smaller than the sum of its proper divisors (129111185340).

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

61850785860 is a wasteful number, since it uses less digits than its factorization.

61850785860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22370 (or 22365 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 61850785860 in words is "sixty-one billion, eight hundred fifty million, seven hundred eighty-five thousand, eight hundred sixty".