55782077 has 8 divisors (see below), whose sum is σ = 60131064. Its totient is φ = 51441408.

The previous prime is 55782071. The next prime is 55782127. The reversal of 55782077 is 77028755.

It can be written as a sum of positive squares in 4 ways, for example, as 219961 + 55562116 = 469^2 + 7454^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55782077 - 2¹⁴ = 55765693 is a prime.

It is a super-2 number, since 2×55782077² = 6223280228867858, 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 (55782071) 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, 24833 + ... + 26985.

It is an arithmetic number, because the mean of its divisors is an integer number (7516383).

Almost surely, 2^55782077 is an apocalyptic number.

It is an amenable number.

55782077 is a deficient number, since it is larger than the sum of its proper divisors (4348987).

55782077 is a wasteful number, since it uses less digits than its factorization.

55782077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159.

The product of its (nonzero) digits is 137200, while the sum is 41.

The square root of 55782077 is about 7468.7399874410. The cubic root of 55782077 is about 382.0893155737.

The spelling of 55782077 in words is "fifty-five million, seven hundred eighty-two thousand, seventy-seven".