697491434880 has 384 divisors, whose sum is σ = 2645529120000. Its totient is φ = 168546521088.

The previous prime is 697491434867. The next prime is 697491434947. The reversal of 697491434880 is 88434194796.

697491434880 is a `hidden beast` number, since 6 + 9 + 7 + 4 + 9 + 143 + 488 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×697491434880² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2378571 + ... + 2655669.

It is an arithmetic number, because the mean of its divisors is an integer number (6889398750).

Almost surely, 2^697491434880 is an apocalyptic number.

697491434880 is a gapful number since it is divisible by the number (60) 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 697491434880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322764560000).

697491434880 is an abundant number, since it is smaller than the sum of its proper divisors (1948037685120).

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

697491434880 is a wasteful number, since it uses less digits than its factorization.

697491434880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277166 (or 277151 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 697491434880 in words is "six hundred ninety-seven billion, four hundred ninety-one million, four hundred thirty-four thousand, eight hundred eighty".