71785785790 has 8 divisors (see below), whose sum is σ = 129214414440. Its totient is φ = 28714314312.

The previous prime is 71785785751. The next prime is 71785785793. The reversal of 71785785790 is 9758758717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71785785793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3589289280 + ... + 3589289299.

It is an arithmetic number, because the mean of its divisors is an integer number (16151801805).

Almost surely, 2^71785785790 is an apocalyptic number.

71785785790 is a deficient number, since it is larger than the sum of its proper divisors (57428628650).

71785785790 is a wasteful number, since it uses less digits than its factorization.

71785785790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7178578586.

The product of its (nonzero) digits is 34574400, while the sum is 64.

The spelling of 71785785790 in words is "seventy-one billion, seven hundred eighty-five million, seven hundred eighty-five thousand, seven hundred ninety".