786644661072 has 80 divisors (see below), whose sum is σ = 2102432221440. Its totient is φ = 253149851136.

The previous prime is 786644661071. The next prime is 786644661107. The reversal of 786644661072 is 270166446687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (786644661071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21874018 + ... + 21909950.

It is an arithmetic number, because the mean of its divisors is an integer number (26280402768).

Almost surely, 2^786644661072 is an apocalyptic number.

It is an amenable number.

786644661072 is an abundant number, since it is smaller than the sum of its proper divisors (1315787560368).

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

786644661072 is a wasteful number, since it uses less digits than its factorization.

786644661072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51700 (or 51694 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 786644661072 in words is "seven hundred eighty-six billion, six hundred forty-four million, six hundred sixty-one thousand, seventy-two".