689843421042 has 32 divisors (see below), whose sum is σ = 1427497426944. Its totient is φ = 222013798800.

The previous prime is 689843420993. The next prime is 689843421053. The reversal of 689843421042 is 240124348986.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4222428 + ... + 4382759.

It is an arithmetic number, because the mean of its divisors is an integer number (44609294592).

Almost surely, 2^689843421042 is an apocalyptic number.

689843421042 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

689843421042 is an abundant number, since it is smaller than the sum of its proper divisors (737654005902).

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

689843421042 is a wasteful number, since it uses less digits than its factorization.

689843421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605654.

The product of its (nonzero) digits is 2654208, while the sum is 51.

The spelling of 689843421042 in words is "six hundred eighty-nine billion, eight hundred forty-three million, four hundred twenty-one thousand, forty-two".