681501258 has 24 divisors (see below), whose sum is σ = 1477755396. Its totient is φ = 226987200.

The previous prime is 681501257. The next prime is 681501259. The reversal of 681501258 is 852105186.

It is an interprime number because it is at equal distance from previous prime (681501257) and next prime (681501259).

It can be written as a sum of positive squares in 2 ways, for example, as 471628089 + 209873169 = 21717^2 + 14487^2 .

It is not an unprimeable number, because it can be changed into a prime (681501257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9448 + ... + 38108.

Almost surely, 2^681501258 is an apocalyptic number.

681501258 is an abundant number, since it is smaller than the sum of its proper divisors (796254138).

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

681501258 is a wasteful number, since it uses less digits than its factorization.

681501258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29990 (or 29987 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 681501258 is about 26105.5790588908. The cubic root of 681501258 is about 880.0125936559.

The spelling of 681501258 in words is "six hundred eighty-one million, five hundred one thousand, two hundred fifty-eight".