55789861 has 4 divisors (see below), whose sum is σ = 56462112. Its totient is φ = 55117612.

The previous prime is 55789859. The next prime is 55789873. The reversal of 55789861 is 16898755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16898755 = 5 ⋅3379751.

It is a cyclic number.

It is not a de Polignac number, because 55789861 - 2¹ = 55789859 is a prime.

It is a super-2 number, since 2×55789861² = 6225017180798642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55789891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336001 + ... + 336166.

It is an arithmetic number, because the mean of its divisors is an integer number (14115528).

Almost surely, 2^55789861 is an apocalyptic number.

It is an amenable number.

55789861 is a deficient number, since it is larger than the sum of its proper divisors (672251).

55789861 is an equidigital number, since it uses as much as digits as its factorization.

55789861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672250.

The product of its digits is 604800, while the sum is 49.

The square root of 55789861 is about 7469.2610745642. The cubic root of 55789861 is about 382.1070873806.

The spelling of 55789861 in words is "fifty-five million, seven hundred eighty-nine thousand, eight hundred sixty-one".