55980865 has 8 divisors (see below), whose sum is σ = 67434048. Its totient is φ = 44613360.

The previous prime is 55980863. The next prime is 55980913. The reversal of 55980865 is 56808955.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55980865 - 2¹ = 55980863 is a prime.

It is a super-2 number, since 2×55980865² = 6267714492296450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55980863) 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, 19971 + ... + 22600.

It is an arithmetic number, because the mean of its divisors is an integer number (8429256).

Almost surely, 2^55980865 is an apocalyptic number.

It is an amenable number.

55980865 is a deficient number, since it is larger than the sum of its proper divisors (11453183).

55980865 is a wasteful number, since it uses less digits than its factorization.

55980865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42839.

The product of its (nonzero) digits is 432000, while the sum is 46.

The square root of 55980865 is about 7482.0361533476. The cubic root of 55980865 is about 382.5426554734.

The spelling of 55980865 in words is "fifty-five million, nine hundred eighty thousand, eight hundred sixty-five".