623126751381 has 6 divisors (see below), whose sum is σ = 900071974230. Its totient is φ = 415417834248.

The previous prime is 623126751367. The next prime is 623126751407. The reversal of 623126751381 is 183157621326.

It is a happy number.

623126751381 is a `hidden beast` number, since 6 + 2 + 3 + 1 + 267 + 5 + 1 + 381 = 666.

It can be written as a sum of positive squares in only one way, i.e., 337056880356 + 286069871025 = 580566^2 + 534855^2 .

It is not a de Polignac number, because 623126751381 - 2⁵ = 623126751349 is a prime.

It is a super-2 number, since 2×623126751381² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623126751301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34618152846 + ... + 34618152863.

It is an arithmetic number, because the mean of its divisors is an integer number (150011995705).

Almost surely, 2^623126751381 is an apocalyptic number.

It is an amenable number.

623126751381 is a deficient number, since it is larger than the sum of its proper divisors (276945222849).

623126751381 is a wasteful number, since it uses less digits than its factorization.

623126751381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69236305715 (or 69236305712 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 623126751381 in words is "six hundred twenty-three billion, one hundred twenty-six million, seven hundred fifty-one thousand, three hundred eighty-one".