905257315621 has 8 divisors (see below), whose sum is σ = 934781151744. Its totient is φ = 875753603760.

The previous prime is 905257315609. The next prime is 905257315637. The reversal of 905257315621 is 126513752509.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-905257315621 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 (905257315691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4939606 + ... + 5119591.

It is an arithmetic number, because the mean of its divisors is an integer number (116847643968).

Almost surely, 2^905257315621 is an apocalyptic number.

It is an amenable number.

905257315621 is a deficient number, since it is larger than the sum of its proper divisors (29523836123).

905257315621 is a wasteful number, since it uses less digits than its factorization.

905257315621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10062131.

The product of its (nonzero) digits is 567000, while the sum is 46.

The spelling of 905257315621 in words is "nine hundred five billion, two hundred fifty-seven million, three hundred fifteen thousand, six hundred twenty-one".