691820946432 has 1408 divisors, whose sum is σ = 2716581888000. Its totient is φ = 168608563200.

The previous prime is 691820946391. The next prime is 691820946433. The reversal of 691820946432 is 234649028196.

691820946432 is a `hidden beast` number, since 6 + 91 + 82 + 0 + 9 + 46 + 432 = 666.

It is a tau number, because it is divible by the number of its divisors (1408).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (691820946433) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3476487069 + ... + 3476487267.

Almost surely, 2^691820946432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691820946432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358290944000).

691820946432 is an abundant number, since it is smaller than the sum of its proper divisors (2024760941568).

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

691820946432 is a wasteful number, since it uses less digits than its factorization.

691820946432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 691820946432 in words is "six hundred ninety-one billion, eight hundred twenty million, nine hundred forty-six thousand, four hundred thirty-two".