41620856509 has 4 divisors (see below), whose sum is σ = 44069142204. Its totient is φ = 39172570816.

The previous prime is 41620856507. The next prime is 41620856527. The reversal of 41620856509 is 90565802614.

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 12410628409 + 29210228100 = 111403^2 + 170910^2 .

It is a cyclic number.

It is not a de Polignac number, because 41620856509 - 2¹ = 41620856507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41620856507) 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, 1224142822 + ... + 1224142855.

It is an arithmetic number, because the mean of its divisors is an integer number (11017285551).

Almost surely, 2^41620856509 is an apocalyptic number.

It is an amenable number.

41620856509 is a deficient number, since it is larger than the sum of its proper divisors (2448285695).

41620856509 is a wasteful number, since it uses less digits than its factorization.

41620856509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448285694.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 41620856509 in words is "forty-one billion, six hundred twenty million, eight hundred fifty-six thousand, five hundred nine".