694144760478 has 128 divisors (see below), whose sum is σ = 1670082624000. Its totient is φ = 190012096512.

The previous prime is 694144760443. The next prime is 694144760521. The reversal of 694144760478 is 874067441496.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11281425 + ... + 11342787.

It is an arithmetic number, because the mean of its divisors is an integer number (13047520500).

Almost surely, 2^694144760478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694144760478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835041312000).

694144760478 is an abundant number, since it is smaller than the sum of its proper divisors (975937863522).

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

694144760478 is a wasteful number, since it uses less digits than its factorization.

694144760478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61866.

The product of its (nonzero) digits is 32514048, while the sum is 60.

The spelling of 694144760478 in words is "six hundred ninety-four billion, one hundred forty-four million, seven hundred sixty thousand, four hundred seventy-eight".