1621041265602 has 48 divisors (see below), whose sum is σ = 3851001677952. Its totient is φ = 488731088160.

The previous prime is 1621041265583. The next prime is 1621041265609. The reversal of 1621041265602 is 2065621401261.

1621041265602 is a `hidden beast` number, since 1 + 6 + 2 + 1 + 0 + 41 + 2 + 6 + 5 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (1621041265609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20740378 + ... + 20818389.

It is an arithmetic number, because the mean of its divisors is an integer number (80229201624).

Almost surely, 2^{1621041265602} is an apocalyptic number.

1621041265602 is an abundant number, since it is smaller than the sum of its proper divisors (2229960412350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621041265602 is a wasteful number, since it uses less digits than its factorization.

1621041265602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41558983 (or 41558980 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 1621041265602 its reverse (2065621401261), we get a palindrome (3686662666863).

The spelling of 1621041265602 in words is "one trillion, six hundred twenty-one billion, forty-one million, two hundred sixty-five thousand, six hundred two".