40621663565 has 8 divisors (see below), whose sum is σ = 55709710080. Its totient is φ = 27854854992.

The previous prime is 40621663561. The next prime is 40621663573. The reversal of 40621663565 is 56536612604.

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

It is a cyclic number.

It is not a de Polignac number, because 40621663565 - 2² = 40621663561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40621663561) 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, 580309445 + ... + 580309514.

It is an arithmetic number, because the mean of its divisors is an integer number (6963713760).

Almost surely, 2^40621663565 is an apocalyptic number.

It is an amenable number.

40621663565 is a deficient number, since it is larger than the sum of its proper divisors (15088046515).

40621663565 is a wasteful number, since it uses less digits than its factorization.

40621663565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160618971.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 40621663565 in words is "forty billion, six hundred twenty-one million, six hundred sixty-three thousand, five hundred sixty-five".