555401491 has 4 divisors (see below), whose sum is σ = 567218592. Its totient is φ = 543584392.

The previous prime is 555401489. The next prime is 555401507. The reversal of 555401491 is 194104555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 555401491 - 2¹ = 555401489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555401411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5908480 + ... + 5908573.

It is an arithmetic number, because the mean of its divisors is an integer number (141804648).

Almost surely, 2^555401491 is an apocalyptic number.

555401491 is a deficient number, since it is larger than the sum of its proper divisors (11817101).

555401491 is a wasteful number, since it uses less digits than its factorization.

555401491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11817100.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 555401491 is about 23566.9576101796. The cubic root of 555401491 is about 821.9946932445.

The spelling of 555401491 in words is "five hundred fifty-five million, four hundred one thousand, four hundred ninety-one".