687632393448 has 1536 divisors, whose sum is σ = 2713761792000. Its totient is φ = 160487308800.

The previous prime is 687632393341. The next prime is 687632393467. The reversal of 687632393448 is 844393236786.

687632393448 is a `hidden beast` number, since 6 + 8 + 76 + 32 + 3 + 93 + 448 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 8704207473 + ... + 8704207551.

It is an arithmetic number, because the mean of its divisors is an integer number (1766772000).

Almost surely, 2^687632393448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687632393448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356880896000).

687632393448 is an abundant number, since it is smaller than the sum of its proper divisors (2026129398552).

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

687632393448 is a wasteful number, since it uses less digits than its factorization.

687632393448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 186 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 63.

The spelling of 687632393448 in words is "six hundred eighty-seven billion, six hundred thirty-two million, three hundred ninety-three thousand, four hundred forty-eight".