555405961 has 8 divisors (see below), whose sum is σ = 611260704. Its totient is φ = 500445120.

The previous prime is 555405953. The next prime is 555405971. The reversal of 555405961 is 169504555.

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 555405961 - 2³ = 555405953 is a prime.

It is a super-3 number, since 3×555405961³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555405901) 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, 222171 + ... + 224656.

It is an arithmetic number, because the mean of its divisors is an integer number (76407588).

Almost surely, 2^555405961 is an apocalyptic number.

It is an amenable number.

555405961 is a deficient number, since it is larger than the sum of its proper divisors (55854743).

555405961 is a wasteful number, since it uses less digits than its factorization.

555405961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446951.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 555405961 is about 23567.0524461588. The cubic root of 555405961 is about 821.9968984398.

The spelling of 555405961 in words is "five hundred fifty-five million, four hundred five thousand, nine hundred sixty-one".