1401573643546 has 16 divisors (see below), whose sum is σ = 2213893756800. Its totient is φ = 664168122288.

The previous prime is 1401573643543. The next prime is 1401573643553. The reversal of 1401573643546 is 6453463751041.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401573643546.

It is not an unprimeable number, because it can be changed into a prime (1401573643543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139761006 + ... + 139771033.

It is an arithmetic number, because the mean of its divisors is an integer number (138368359800).

Almost surely, 2^{1401573643546} is an apocalyptic number.

1401573643546 is a deficient number, since it is larger than the sum of its proper divisors (812320113254).

1401573643546 is a wasteful number, since it uses less digits than its factorization.

1401573643546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279532173.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 1401573643546 in words is "one trillion, four hundred one billion, five hundred seventy-three million, six hundred forty-three thousand, five hundred forty-six".