688144051 has 8 divisors (see below), whose sum is σ = 787892480. Its totient is φ = 588756168.

The previous prime is 688144021. The next prime is 688144057. The reversal of 688144051 is 150441886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 688144051 - 2¹¹ = 688142003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688144051.

It is not an unprimeable number, because it can be changed into a prime (688144057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86031 + ... + 93688.

It is an arithmetic number, because the mean of its divisors is an integer number (98486560).

Almost surely, 2^688144051 is an apocalyptic number.

688144051 is a deficient number, since it is larger than the sum of its proper divisors (99748429).

688144051 is a wasteful number, since it uses less digits than its factorization.

688144051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180273.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 688144051 is about 26232.4998999333. The cubic root of 688144051 is about 882.8626007692.

The spelling of 688144051 in words is "six hundred eighty-eight million, one hundred forty-four thousand, fifty-one".