55904945 has 8 divisors (see below), whose sum is σ = 68646336. Its totient is φ = 43683696.

The previous prime is 55904939. The next prime is 55904951. The reversal of 55904945 is 54940955.

It is an interprime number because it is at equal distance from previous prime (55904939) and next prime (55904951).

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 55904945 - 2¹⁸ = 55642801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129797 + ... + 130226.

It is an arithmetic number, because the mean of its divisors is an integer number (8580792).

Almost surely, 2^55904945 is an apocalyptic number.

It is an amenable number.

55904945 is a deficient number, since it is larger than the sum of its proper divisors (12741391).

55904945 is a wasteful number, since it uses less digits than its factorization.

55904945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260071.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55904945 is about 7476.9609468018. The cubic root of 55904945 is about 382.3696453011.

The spelling of 55904945 in words is "fifty-five million, nine hundred four thousand, nine hundred forty-five".