55847661 has 4 divisors (see below), whose sum is σ = 74463552. Its totient is φ = 37231772.

The previous prime is 55847641. The next prime is 55847663. The reversal of 55847661 is 16674855.

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.

It is a cyclic number.

It is not a de Polignac number, because 55847661 - 2⁹ = 55847149 is a prime.

It is a super-2 number, since 2×55847661² = 6237922478341842, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55847663) 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, 9307941 + ... + 9307946.

It is an arithmetic number, because the mean of its divisors is an integer number (18615888).

Almost surely, 2^55847661 is an apocalyptic number.

It is an amenable number.

55847661 is a deficient number, since it is larger than the sum of its proper divisors (18615891).

55847661 is a wasteful number, since it uses less digits than its factorization.

55847661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18615890.

The product of its digits is 201600, while the sum is 42.

The square root of 55847661 is about 7473.1292642373. The cubic root of 55847661 is about 382.2390000403.

The spelling of 55847661 in words is "fifty-five million, eight hundred forty-seven thousand, six hundred sixty-one".