697272891264 has 192 divisors, whose sum is σ = 2068978962960. Its totient is φ = 225289838592.

The previous prime is 697272891221. The next prime is 697272891269. The reversal of 697272891264 is 462198272796.

697272891264 is a `hidden beast` number, since 6 + 97 + 2 + 7 + 289 + 1 + 264 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697272891269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4998852 + ... + 5136444.

Almost surely, 2^697272891264 is an apocalyptic number.

697272891264 is a gapful number since it is divisible by the number (64) 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 697272891264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034489481480).

697272891264 is an abundant number, since it is smaller than the sum of its proper divisors (1371706071696).

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

697272891264 is a wasteful number, since it uses less digits than its factorization.

697272891264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137749 (or 137734 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 697272891264 in words is "six hundred ninety-seven billion, two hundred seventy-two million, eight hundred ninety-one thousand, two hundred sixty-four".