1423640475731 has 4 divisors (see below), whose sum is σ = 1429547697864. Its totient is φ = 1417733253600.

The previous prime is 1423640475709. The next prime is 1423640475737. The reversal of 1423640475731 is 1375740463241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1423640475731 - 2⁶ = 1423640475667 is a prime.

It is a super-2 number, since 2×1423640475731² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423640475737) 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 in 3 ways as a sum of consecutive naturals, for example, 2953610705 + ... + 2953611186.

It is an arithmetic number, because the mean of its divisors is an integer number (357386924466).

Almost surely, 2^{1423640475731} is an apocalyptic number.

1423640475731 is a deficient number, since it is larger than the sum of its proper divisors (5907222133).

1423640475731 is an equidigital number, since it uses as much as digits as its factorization.

1423640475731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907222132.

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 1423640475731 in words is "one trillion, four hundred twenty-three billion, six hundred forty million, four hundred seventy-five thousand, seven hundred thirty-one".