393961440654 has 24 divisors (see below), whose sum is σ = 898508549640. Its totient is φ = 124408875888.

The previous prime is 393961440589. The next prime is 393961440659. The reversal of 393961440654 is 456044169393.

It is a happy number.

393961440654 is a `hidden beast` number, since 3 + 93 + 9 + 61 + 440 + 6 + 54 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 393961440654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393961440659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 575966677 + ... + 575967360.

It is an arithmetic number, because the mean of its divisors is an integer number (37437856235).

Almost surely, 2^393961440654 is an apocalyptic number.

393961440654 is an abundant number, since it is smaller than the sum of its proper divisors (504547108986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

393961440654 is a wasteful number, since it uses less digits than its factorization.

393961440654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151934064 (or 1151934061 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 393961440654 in words is "three hundred ninety-three billion, nine hundred sixty-one million, four hundred forty thousand, six hundred fifty-four".