684136451031 has 16 divisors (see below), whose sum is σ = 995239538688. Its totient is φ = 414573163200.

The previous prime is 684136450997. The next prime is 684136451057. The reversal of 684136451031 is 130154631486.

It is not a de Polignac number, because 684136451031 - 2⁹ = 684136450519 is a prime.

It is a super-2 number, since 2×684136451031² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684136450031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121431 + ... + 1620456.

It is an arithmetic number, because the mean of its divisors is an integer number (62202471168).

Almost surely, 2^684136451031 is an apocalyptic number.

684136451031 is a deficient number, since it is larger than the sum of its proper divisors (311103087657).

684136451031 is a wasteful number, since it uses less digits than its factorization.

684136451031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749462.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 684136451031 in words is "six hundred eighty-four billion, one hundred thirty-six million, four hundred fifty-one thousand, thirty-one".