55691064 has 160 divisors (see below), whose sum is σ = 183561840. Its totient is φ = 15552000.

The previous prime is 55691059. The next prime is 55691087. The reversal of 55691064 is 46019655.

55691064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 92364 + ... + 92964.

Almost surely, 2^55691064 is an apocalyptic number.

55691064 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55691064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91780920).

55691064 is an abundant number, since it is smaller than the sum of its proper divisors (127870776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55691064 is a wasteful number, since it uses less digits than its factorization.

55691064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55691064 is about 7462.6445714639. The cubic root of 55691064 is about 381.8813991801.

The spelling of 55691064 in words is "fifty-five million, six hundred ninety-one thousand, sixty-four".