55641570 has 32 divisors (see below), whose sum is σ = 136648512. Its totient is φ = 14492352.

The previous prime is 55641569. The next prime is 55641571. The reversal of 55641570 is 7514655.

It is an interprime number because it is at equal distance from previous prime (55641569) and next prime (55641571).

It is not an unprimeable number, because it can be changed into a prime (55641571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20277 + ... + 22856.

It is an arithmetic number, because the mean of its divisors is an integer number (4270266).

Almost surely, 2^55641570 is an apocalyptic number.

55641570 is an abundant number, since it is smaller than the sum of its proper divisors (81006942).

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

55641570 is a wasteful number, since it uses less digits than its factorization.

55641570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43186.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 55641570 is about 7459.3277176968. The cubic root of 55641570 is about 381.7682365612.

The spelling of 55641570 in words is "fifty-five million, six hundred forty-one thousand, five hundred seventy".