653206478 has 4 divisors (see below), whose sum is σ = 979809720. Its totient is φ = 326603238.

The previous prime is 653206459. The next prime is 653206501. The reversal of 653206478 is 874602356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163301618 + ... + 163301621.

It is an arithmetic number, because the mean of its divisors is an integer number (244952430).

Almost surely, 2^653206478 is an apocalyptic number.

653206478 is a deficient number, since it is larger than the sum of its proper divisors (326603242).

653206478 is a wasteful number, since it uses less digits than its factorization.

653206478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326603241.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 653206478 is about 25557.9044133121. The cubic root of 653206478 is about 867.6611678067.

The spelling of 653206478 in words is "six hundred fifty-three million, two hundred six thousand, four hundred seventy-eight".