685101054 has 64 divisors (see below), whose sum is σ = 1633830912. Its totient is φ = 189081600.

The previous prime is 685101047. The next prime is 685101059. The reversal of 685101054 is 450101586.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685101059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24934 + ... + 44630.

It is an arithmetic number, because the mean of its divisors is an integer number (25528608).

Almost surely, 2^685101054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685101054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816915456).

685101054 is an abundant number, since it is smaller than the sum of its proper divisors (948729858).

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

685101054 is a wasteful number, since it uses less digits than its factorization.

685101054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19761.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 685101054 is about 26174.4351228446. The cubic root of 685101054 is about 881.5593280981.

The spelling of 685101054 in words is "six hundred eighty-five million, one hundred one thousand, fifty-four".