53649770 has 8 divisors (see below), whose sum is σ = 96569604. Its totient is φ = 21459904.

The previous prime is 53649763. The next prime is 53649779. The reversal of 53649770 is 7794635.

It can be written as a sum of positive squares in 2 ways, for example, as 49434961 + 4214809 = 7031^2 + 2053^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53649779) 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, 2682479 + ... + 2682498.

Almost surely, 2^53649770 is an apocalyptic number.

53649770 is a deficient number, since it is larger than the sum of its proper divisors (42919834).

53649770 is a wasteful number, since it uses less digits than its factorization.

53649770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364984.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 53649770 is about 7324.6003303935. The cubic root of 53649770 is about 377.1573898347.

The spelling of 53649770 in words is "fifty-three million, six hundred forty-nine thousand, seven hundred seventy".