55779845 has 16 divisors (see below), whose sum is σ = 74115648. Its totient is φ = 39959040.

The previous prime is 55779833. The next prime is 55779863. The reversal of 55779845 is 54897755.

It is not a de Polignac number, because 55779845 - 2⁶ = 55779781 is a prime.

It is a super-2 number, since 2×55779845² = 6222782216448050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55779793 and 55779802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3884 + ... + 11253.

It is an arithmetic number, because the mean of its divisors is an integer number (4632228).

Almost surely, 2^55779845 is an apocalyptic number.

55779845 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55779845 is a deficient number, since it is larger than the sum of its proper divisors (18335803).

55779845 is a wasteful number, since it uses less digits than its factorization.

55779845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15220.

The product of its digits is 1764000, while the sum is 50.

The square root of 55779845 is about 7468.5905631518. The cubic root of 55779845 is about 382.0842193446.

The spelling of 55779845 in words is "fifty-five million, seven hundred seventy-nine thousand, eight hundred forty-five".