689355764975 has 12 divisors (see below), whose sum is σ = 859576579560. Its totient is φ = 548403688800.

The previous prime is 689355764969. The next prime is 689355765019. The reversal of 689355764975 is 579467553986.

It is a happy number.

It is not a de Polignac number, because 689355764975 - 2¹⁸ = 689355502831 is a prime.

It is a super-2 number, since 2×689355764975² (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 11 ways as a sum of consecutive naturals, for example, 77018516 + ... + 77027465.

It is an arithmetic number, because the mean of its divisors is an integer number (71631381630).

Almost surely, 2^689355764975 is an apocalyptic number.

689355764975 is a deficient number, since it is larger than the sum of its proper divisors (170220814585).

689355764975 is a wasteful number, since it uses less digits than its factorization.

689355764975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154046170 (or 154046165 counting only the distinct ones).

The product of its digits is 1714608000, while the sum is 74.

The spelling of 689355764975 in words is "six hundred eighty-nine billion, three hundred fifty-five million, seven hundred sixty-four thousand, nine hundred seventy-five".