697145077791 has 12 divisors (see below), whose sum is σ = 1007929338520. Its totient is φ = 464328614160.

The previous prime is 697145077763. The next prime is 697145077799. The reversal of 697145077791 is 197770541796.

697145077791 is a `hidden beast` number, since 6 + 97 + 1 + 450 + 7 + 7 + 7 + 91 = 666.

It is not a de Polignac number, because 697145077791 - 2²⁵ = 697111523359 is a prime.

It is a super-2 number, since 2×697145077791² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697145077799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36220765 + ... + 36240006.

Almost surely, 2^697145077791 is an apocalyptic number.

697145077791 is a deficient number, since it is larger than the sum of its proper divisors (310784260729).

697145077791 is a wasteful number, since it uses less digits than its factorization.

697145077791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72461846 (or 72461843 counting only the distinct ones).

The product of its (nonzero) digits is 23337720, while the sum is 63.

The spelling of 697145077791 in words is "six hundred ninety-seven billion, one hundred forty-five million, seventy-seven thousand, seven hundred ninety-one".