621832450545 has 12 divisors (see below), whose sum is σ = 1077842914356. Its totient is φ = 331643973600.

The previous prime is 621832450507. The next prime is 621832450553. The reversal of 621832450545 is 545054238126.

621832450545 is a `hidden beast` number, since 6 + 2 + 1 + 83 + 24 + 5 + 0 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 73653617664 + 548178832881 = 271392^2 + 740391^2 .

It is not a de Polignac number, because 621832450545 - 2¹² = 621832446449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 13818498901 = 621832450545 / (6 + 2 + 1 + 8 + 3 + 2 + 4 + 5 + 0 + 5 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 621832450545.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6909249406 + ... + 6909249495.

It is an arithmetic number, because the mean of its divisors is an integer number (89820242863).

Almost surely, 2^621832450545 is an apocalyptic number.

It is an amenable number.

621832450545 is a deficient number, since it is larger than the sum of its proper divisors (456010463811).

621832450545 is a wasteful number, since it uses less digits than its factorization.

621832450545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818498912 (or 13818498909 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 621832450545 in words is "six hundred twenty-one billion, eight hundred thirty-two million, four hundred fifty thousand, five hundred forty-five".