621560432541 has 8 divisors (see below), whose sum is σ = 832911803200. Its totient is φ = 412291341792.

The previous prime is 621560432483. The next prime is 621560432569. The reversal of 621560432541 is 145234065126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621560432541 - 2¹⁰ = 621560431517 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 621560432541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621560472541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520569280 + ... + 520570473.

It is an arithmetic number, because the mean of its divisors is an integer number (104113975400).

Almost surely, 2^621560432541 is an apocalyptic number.

It is an amenable number.

621560432541 is a deficient number, since it is larger than the sum of its proper divisors (211351370659).

621560432541 is a wasteful number, since it uses less digits than its factorization.

621560432541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041139955.

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 621560432541 its reverse (145234065126), we get a palindrome (766794497667).

The spelling of 621560432541 in words is "six hundred twenty-one billion, five hundred sixty million, four hundred thirty-two thousand, five hundred forty-one".