61785137106852 has 24 divisors (see below), whose sum is σ = 144165999743136. Its totient is φ = 20594948584128.

The previous prime is 61785137106773. The next prime is 61785137106911. The reversal of 61785137106852 is 25860173158716.

It is a super-3 number, since 3×61785137106852³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9465433 + ... + 14600160.

It is an arithmetic number, because the mean of its divisors is an integer number (6006916655964).

Almost surely, 2^{61785137106852} is an apocalyptic number.

It is an amenable number.

61785137106852 is an abundant number, since it is smaller than the sum of its proper divisors (82380862636284).

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

61785137106852 is a wasteful number, since it uses less digits than its factorization.

61785137106852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24279547 (or 24279545 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 60.

The spelling of 61785137106852 in words is "sixty-one trillion, seven hundred eighty-five billion, one hundred thirty-seven million, one hundred six thousand, eight hundred fifty-two".