904023420561 has 48 divisors (see below), whose sum is σ = 1367695300608. Its totient is φ = 574809523200.

The previous prime is 904023420557. The next prime is 904023420581. The reversal of 904023420561 is 165024320409.

It is a happy number.

904023420561 is a `hidden beast` number, since 9 + 0 + 40 + 2 + 34 + 20 + 561 = 666.

It is not a de Polignac number, because 904023420561 - 2² = 904023420557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (904023420581) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15249600 + ... + 15308766.

It is an arithmetic number, because the mean of its divisors is an integer number (28493652096).

Almost surely, 2^904023420561 is an apocalyptic number.

It is an amenable number.

904023420561 is a deficient number, since it is larger than the sum of its proper divisors (463671880047).

904023420561 is a wasteful number, since it uses less digits than its factorization.

904023420561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60142 (or 60139 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 904023420561 in words is "nine hundred four billion, twenty-three million, four hundred twenty thousand, five hundred sixty-one".