697219756464 has 640 divisors, whose sum is σ = 2409708625920. Its totient is φ = 168260198400.

The previous prime is 697219756357. The next prime is 697219756481. The reversal of 697219756464 is 464657912796.

It is a super-2 number, since 2×697219756464² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 697219756395 and 697219756404.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1419999259 + ... + 1419999749.

It is an arithmetic number, because the mean of its divisors is an integer number (3765169728).

Almost surely, 2^697219756464 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 697219756464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1204854312960).

697219756464 is an abundant number, since it is smaller than the sum of its proper divisors (1712488869456).

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

697219756464 is a wasteful number, since it uses less digits than its factorization.

697219756464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 883 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 66.

The spelling of 697219756464 in words is "six hundred ninety-seven billion, two hundred nineteen million, seven hundred fifty-six thousand, four hundred sixty-four".