1621845429436 has 12 divisors (see below), whose sum is σ = 2907454611600. Its totient is φ = 791144111840.

The previous prime is 1621845429419. The next prime is 1621845429511. The reversal of 1621845429436 is 6349245481261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4944650536 + ... + 4944650863.

It is an arithmetic number, because the mean of its divisors is an integer number (242287884300).

Almost surely, 2^{1621845429436} is an apocalyptic number.

It is an amenable number.

1621845429436 is a deficient number, since it is larger than the sum of its proper divisors (1285609182164).

1621845429436 is a wasteful number, since it uses less digits than its factorization.

1621845429436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889301444 (or 9889301442 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The spelling of 1621845429436 in words is "one trillion, six hundred twenty-one billion, eight hundred forty-five million, four hundred twenty-nine thousand, four hundred thirty-six".