1621877028050 has 12 divisors (see below), whose sum is σ = 3016691272266. Its totient is φ = 648750811200.

The previous prime is 1621877028043. The next prime is 1621877028157. The reversal of 1621877028050 is 508207781261.

It can be written as a sum of positive squares in 3 ways, for example, as 1420427761489 + 201449266561 = 1191817^2 + 448831^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1621877027986 and 1621877028004.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16218770231 + ... + 16218770330.

Almost surely, 2^{1621877028050} is an apocalyptic number.

1621877028050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621877028050 is a deficient number, since it is larger than the sum of its proper divisors (1394814244216).

1621877028050 is a wasteful number, since it uses less digits than its factorization.

1621877028050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32437540573 (or 32437540568 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 1621877028050 in words is "one trillion, six hundred twenty-one billion, eight hundred seventy-seven million, twenty-eight thousand, fifty".