55772758 has 4 divisors (see below), whose sum is σ = 83659140. Its totient is φ = 27886378.

The previous prime is 55772747. The next prime is 55772779. The reversal of 55772758 is 85727755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85727755 = 5 ⋅17145551.

It is a super-2 number, since 2×55772758² = 6221201069853128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13943188 + ... + 13943191.

It is an arithmetic number, because the mean of its divisors is an integer number (20914785).

Almost surely, 2^55772758 is an apocalyptic number.

55772758 is a deficient number, since it is larger than the sum of its proper divisors (27886382).

55772758 is a wasteful number, since it uses less digits than its factorization.

55772758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27886381.

The product of its digits is 686000, while the sum is 46.

The square root of 55772758 is about 7468.1160944377. The cubic root of 55772758 is about 382.0680370029.

The spelling of 55772758 in words is "fifty-five million, seven hundred seventy-two thousand, seven hundred fifty-eight".