55909570 has 8 divisors (see below), whose sum is σ = 100637244. Its totient is φ = 22363824.

The previous prime is 55909561. The next prime is 55909577. The reversal of 55909570 is 7590955.

It can be written as a sum of positive squares in 2 ways, for example, as 55666521 + 243049 = 7461^2 + 493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55909577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2795469 + ... + 2795488.

Almost surely, 2^55909570 is an apocalyptic number.

55909570 is a deficient number, since it is larger than the sum of its proper divisors (44727674).

55909570 is a wasteful number, since it uses less digits than its factorization.

55909570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5590964.

The product of its (nonzero) digits is 70875, while the sum is 40.

The square root of 55909570 is about 7477.2702238183. The cubic root of 55909570 is about 382.3801894539.

The spelling of 55909570 in words is "fifty-five million, nine hundred nine thousand, five hundred seventy".