621564041 has 8 divisors (see below), whose sum is σ = 710513280. Its totient is φ = 532653408.

The previous prime is 621564023. The next prime is 621564061. The reversal of 621564041 is 140465126.

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

It is not a de Polignac number, because 621564041 - 2¹⁴ = 621547657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621563995 and 621564013.

It is not an unprimeable number, because it can be changed into a prime (621564061) 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, 47180 + ... + 58898.

It is an arithmetic number, because the mean of its divisors is an integer number (88814160).

Almost surely, 2^621564041 is an apocalyptic number.

It is an amenable number.

621564041 is a deficient number, since it is larger than the sum of its proper divisors (88949239).

621564041 is a wasteful number, since it uses less digits than its factorization.

621564041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19303.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 621564041 is about 24931.1861129791. The cubic root of 621564041 is about 853.4183181385.

The spelling of 621564041 in words is "six hundred twenty-one million, five hundred sixty-four thousand, forty-one".