1621624662146 has 8 divisors (see below), whose sum is σ = 2445040294284. Its totient is φ = 806611230720.

The previous prime is 1621624662143. The next prime is 1621624662149. The reversal of 1621624662146 is 6412664261261.

It is an interprime number because it is at equal distance from previous prime (1621624662143) and next prime (1621624662149).

It can be written as a sum of positive squares in 2 ways, for example, as 1558165510225 + 63459151921 = 1248265^2 + 251911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1621624662146.

It is not an unprimeable number, because it can be changed into a prime (1621624662143) 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 3 ways as a sum of consecutive naturals, for example, 2100549695 + ... + 2100550466.

Almost surely, 2^{1621624662146} is an apocalyptic number.

1621624662146 is a deficient number, since it is larger than the sum of its proper divisors (823415632138).

1621624662146 is a wasteful number, since it uses less digits than its factorization.

1621624662146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201100356.

The product of its digits is 995328, while the sum is 47.

The spelling of 1621624662146 in words is "one trillion, six hundred twenty-one billion, six hundred twenty-four million, six hundred sixty-two thousand, one hundred forty-six".