689811851536 has 40 divisors (see below), whose sum is σ = 1394709107904. Its totient is φ = 329888845440.

The previous prime is 689811851489. The next prime is 689811851543. The reversal of 689811851536 is 635158118986.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6719151 + ... + 6821041.

Almost surely, 2^689811851536 is an apocalyptic number.

It is an amenable number.

689811851536 is an abundant number, since it is smaller than the sum of its proper divisors (704897256368).

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

689811851536 is a wasteful number, since it uses less digits than its factorization.

689811851536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120319 (or 120313 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 61.

The spelling of 689811851536 in words is "six hundred eighty-nine billion, eight hundred eleven million, eight hundred fifty-one thousand, five hundred thirty-six".