691147445201136 has 720 divisors, whose sum is σ = 2627623819312128. Its totient is φ = 173727871027200.

The previous prime is 691147445201089. The next prime is 691147445201153. The reversal of 691147445201136 is 631102544741196.

691147445201136 is a `hidden beast` number, since 6 + 9 + 1 + 1 + 4 + 74 + 4 + 520 + 11 + 36 = 666.

691147445201136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 59645176 + ... + 70284008.

Almost surely, 2^{691147445201136} is an apocalyptic number.

691147445201136 is a gapful number since it is divisible by the number (66) 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 691147445201136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313811909656064).

691147445201136 is an abundant number, since it is smaller than the sum of its proper divisors (1936476374110992).

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

691147445201136 is a wasteful number, since it uses less digits than its factorization.

691147445201136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10638912 (or 10638887 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 691147445201136 in words is "six hundred ninety-one trillion, one hundred forty-seven billion, four hundred forty-five million, two hundred one thousand, one hundred thirty-six".