681373152 has 36 divisors (see below), whose sum is σ = 1937655720. Its totient is φ = 227124288.

The previous prime is 681373127. The next prime is 681373153. The reversal of 681373152 is 251373186.

681373152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681373153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1182652 + ... + 1183227.

It is an arithmetic number, because the mean of its divisors is an integer number (53823770).

Almost surely, 2^681373152 is an apocalyptic number.

It is an amenable number.

681373152 is an abundant number, since it is smaller than the sum of its proper divisors (1256282568).

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

681373152 is a wasteful number, since it uses less digits than its factorization.

681373152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365895 (or 2365884 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 681373152 is about 26103.1253301209. The cubic root of 681373152 is about 879.9574497333.

It can be divided in two parts, 68137 and 3152, that added together give a square (71289 = 267²).

The spelling of 681373152 in words is "six hundred eighty-one million, three hundred seventy-three thousand, one hundred fifty-two".