54777857 has 4 divisors (see below), whose sum is σ = 54817620. Its totient is φ = 54738096.

The previous prime is 54777851. The next prime is 54777883. The reversal of 54777857 is 75877745.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75877745 = 5 ⋅15175549.

It can be written as a sum of positive squares in 2 ways, for example, as 18284176 + 36493681 = 4276^2 + 6041^2 .

It is a cyclic number.

It is not a de Polignac number, because 54777857 - 2¹⁰ = 54776833 is a prime.

It is a super-2 number, since 2×54777857² = 6001227235024898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54777851) 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, 17738 + ... + 20595.

It is an arithmetic number, because the mean of its divisors is an integer number (13704405).

Almost surely, 2^54777857 is an apocalyptic number.

It is an amenable number.

54777857 is a deficient number, since it is larger than the sum of its proper divisors (39763).

54777857 is a wasteful number, since it uses less digits than its factorization.

54777857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39762.

The product of its digits is 1920800, while the sum is 50.

The square root of 54777857 is about 7401.2064557071. The cubic root of 54777857 is about 379.7825556527.

The spelling of 54777857 in words is "fifty-four million, seven hundred seventy-seven thousand, eight hundred fifty-seven".