55772906 has 16 divisors (see below), whose sum is σ = 98695680. Its totient is φ = 23131440.

The previous prime is 55772897. The next prime is 55772911. The reversal of 55772906 is 60927755.

55772906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55772906² = 6221234087369672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63821 + ... + 64688.

It is an arithmetic number, because the mean of its divisors is an integer number (6168480).

Almost surely, 2^55772906 is an apocalyptic number.

55772906 is a deficient number, since it is larger than the sum of its proper divisors (42922774).

55772906 is a wasteful number, since it uses less digits than its factorization.

55772906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128549.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 55772906 is about 7468.1260032220. The cubic root of 55772906 is about 382.0683749577.

The spelling of 55772906 in words is "fifty-five million, seven hundred seventy-two thousand, nine hundred six".