1571431728746 has 16 divisors (see below), whose sum is σ = 2571665444640. Its totient is φ = 714222786480.

The previous prime is 1571431728707. The next prime is 1571431728749. The reversal of 1571431728746 is 6478271341751.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1571431728691 and 1571431728700.

It is not an unprimeable number, because it can be changed into a prime (1571431728749) 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 7 ways as a sum of consecutive naturals, for example, 2968016 + ... + 3457163.

It is an arithmetic number, because the mean of its divisors is an integer number (160729090290).

Almost surely, 2^{1571431728746} is an apocalyptic number.

1571431728746 is a deficient number, since it is larger than the sum of its proper divisors (1000233715894).

1571431728746 is a wasteful number, since it uses less digits than its factorization.

1571431728746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436309.

The product of its digits is 7902720, while the sum is 56.

The spelling of 1571431728746 in words is "one trillion, five hundred seventy-one billion, four hundred thirty-one million, seven hundred twenty-eight thousand, seven hundred forty-six".