723681425146 has 4 divisors (see below), whose sum is σ = 1085522137722. Its totient is φ = 361840712572.

The previous prime is 723681425143. The next prime is 723681425171. The reversal of 723681425146 is 641524186327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641524186327 = 20753 ⋅30912359.

It can be written as a sum of positive squares in only one way, i.e., 501285240225 + 222396184921 = 708015^2 + 471589^2 .

It is a super-2 number, since 2×723681425146² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 723681425146.

It is not an unprimeable number, because it can be changed into a prime (723681425143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180920356285 + ... + 180920356288.

Almost surely, 2^723681425146 is an apocalyptic number.

723681425146 is a deficient number, since it is larger than the sum of its proper divisors (361840712576).

723681425146 is a wasteful number, since it uses less digits than its factorization.

723681425146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361840712575.

The product of its digits is 1935360, while the sum is 49.

The spelling of 723681425146 in words is "seven hundred twenty-three billion, six hundred eighty-one million, four hundred twenty-five thousand, one hundred forty-six".