55771636 has 12 divisors (see below), whose sum is σ = 98975520. Its totient is φ = 27492920.

The previous prime is 55771627. The next prime is 55771643. The reversal of 55771636 is 63617755.

It is a happy number.

It is a super-2 number, since 2×55771636² = 6220950764232992, 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 in 3 ways as a sum of consecutive naturals, for example, 97906 + ... + 98473.

It is an arithmetic number, because the mean of its divisors is an integer number (8247960).

Almost surely, 2^55771636 is an apocalyptic number.

It is an amenable number.

55771636 is a deficient number, since it is larger than the sum of its proper divisors (43203884).

55771636 is a wasteful number, since it uses less digits than its factorization.

55771636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196454 (or 196452 counting only the distinct ones).

The product of its digits is 132300, while the sum is 40.

The square root of 55771636 is about 7468.0409747135. The cubic root of 55771636 is about 382.0654749204.

The spelling of 55771636 in words is "fifty-five million, seven hundred seventy-one thousand, six hundred thirty-six".