687264462786 has 96 divisors (see below), whose sum is σ = 1541791854144. Its totient is φ = 202508812800.

The previous prime is 687264462761. The next prime is 687264462889.

687264462786 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24273390 + ... + 24301686.

It is an arithmetic number, because the mean of its divisors is an integer number (16060331814).

Almost surely, 2^687264462786 is an apocalyptic number.

687264462786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 687264462786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770895927072).

687264462786 is an abundant number, since it is smaller than the sum of its proper divisors (854527391358).

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

687264462786 is a wasteful number, since it uses less digits than its factorization.

687264462786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28528 (or 28457 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 66.

The spelling of 687264462786 in words is "six hundred eighty-seven billion, two hundred sixty-four million, four hundred sixty-two thousand, seven hundred eighty-six".