195786692640 has 576 divisors, whose sum is σ = 839925096192. Its totient is φ = 40680161280.

The previous prime is 195786692639. The next prime is 195786692659. The reversal of 195786692640 is 46296687591.

195786692640 is a `hidden beast` number, since 19 + 578 + 6 + 6 + 9 + 2 + 6 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13409184 + ... + 13423776.

It is an arithmetic number, because the mean of its divisors is an integer number (1458203292).

Almost surely, 2^195786692640 is an apocalyptic number.

195786692640 is a gapful number since it is divisible by the number (10) 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 195786692640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419962548096).

195786692640 is an abundant number, since it is smaller than the sum of its proper divisors (644138403552).

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

195786692640 is a wasteful number, since it uses less digits than its factorization.

195786692640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14654 (or 14621 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 195786692640 in words is "one hundred ninety-five billion, seven hundred eighty-six million, six hundred ninety-two thousand, six hundred forty".