691796064 has 48 divisors (see below), whose sum is σ = 1817324208. Its totient is φ = 230426112.

The previous prime is 691796029. The next prime is 691796069. The reversal of 691796064 is 460697196.

691796064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691796069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232474 + ... + 235430.

It is an arithmetic number, because the mean of its divisors is an integer number (37860921).

Almost surely, 2^691796064 is an apocalyptic number.

It is an amenable number.

691796064 is an abundant number, since it is smaller than the sum of its proper divisors (1125528144).

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

691796064 is a wasteful number, since it uses less digits than its factorization.

691796064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407 (or 5399 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 691796064 is about 26302.0163485616. The cubic root of 691796064 is about 884.4216438900.

The spelling of 691796064 in words is "six hundred ninety-one million, seven hundred ninety-six thousand, sixty-four".