1621112003625 has 32 divisors (see below), whose sum is σ = 2856208642560. Its totient is φ = 813734649600.

The previous prime is 1621112003603. The next prime is 1621112003627. The reversal of 1621112003625 is 5263002111261.

It is not a de Polignac number, because 1621112003625 - 2⁸ = 1621112003369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1621112003592 and 1621112003601.

It is not an unprimeable number, because it can be changed into a prime (1621112003627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127139665 + ... + 127152414.

It is an arithmetic number, because the mean of its divisors is an integer number (89256520080).

Almost surely, 2^{1621112003625} is an apocalyptic number.

1621112003625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1621112003625 is a deficient number, since it is larger than the sum of its proper divisors (1235096638935).

1621112003625 is a wasteful number, since it uses less digits than its factorization.

1621112003625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254292114 (or 254292104 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 1621112003625 its reverse (5263002111261), we get a palindrome (6884114114886).

The spelling of 1621112003625 in words is "one trillion, six hundred twenty-one billion, one hundred twelve million, three thousand, six hundred twenty-five".