689509638462 has 32 divisors (see below), whose sum is σ = 1423567816704. Its totient is φ = 222412456800.

The previous prime is 689509638457. The next prime is 689509638469. The reversal of 689509638462 is 264836905986.

It is a junction number, because it is equal to n+sod(n) for n = 689509638393 and 689509638402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689509638469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4841512 + ... + 4981892.

It is an arithmetic number, because the mean of its divisors is an integer number (44486494272).

Almost surely, 2^689509638462 is an apocalyptic number.

689509638462 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

689509638462 is an abundant number, since it is smaller than the sum of its proper divisors (734058178242).

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

689509638462 is a wasteful number, since it uses less digits than its factorization.

689509638462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166824.

The product of its (nonzero) digits is 134369280, while the sum is 66.

The spelling of 689509638462 in words is "six hundred eighty-nine billion, five hundred nine million, six hundred thirty-eight thousand, four hundred sixty-two".