621560551141 has 4 divisors (see below), whose sum is σ = 623080259500. Its totient is φ = 620040842784.

The previous prime is 621560551121. The next prime is 621560551153. The reversal of 621560551141 is 141155065126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 240643226916 + 380917324225 = 490554^2 + 617185^2 .

It is a cyclic number.

It is not a de Polignac number, because 621560551141 - 2⁵ = 621560551109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621560551141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621560551121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759853566 + ... + 759854383.

It is an arithmetic number, because the mean of its divisors is an integer number (155770064875).

Almost surely, 2^621560551141 is an apocalyptic number.

It is an amenable number.

621560551141 is a deficient number, since it is larger than the sum of its proper divisors (1519708359).

621560551141 is a wasteful number, since it uses less digits than its factorization.

621560551141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519708358.

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 621560551141 in words is "six hundred twenty-one billion, five hundred sixty million, five hundred fifty-one thousand, one hundred forty-one".