55955640 has 64 divisors (see below), whose sum is σ = 180784800. Its totient is φ = 13773312.

The previous prime is 55955623. The next prime is 55955657. The reversal of 55955640 is 4655955.

55955640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55955623) and next prime (55955657).

It is a Harshad number since it is a multiple of its sum of digits (39).

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 15 ways as a sum of consecutive naturals, for example, 16375 + ... + 19494.

Almost surely, 2^55955640 is an apocalyptic number.

It is an amenable number.

55955640 is an abundant number, since it is smaller than the sum of its proper divisors (124829160).

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

55955640 is a wasteful number, since it uses less digits than its factorization.

55955640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35896 (or 35892 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 55955640 is about 7480.3502591790. The cubic root of 55955640 is about 382.4851888835.

The spelling of 55955640 in words is "fifty-five million, nine hundred fifty-five thousand, six hundred forty".