53651615520 has 48 divisors (see below), whose sum is σ = 169002590400. Its totient is φ = 14307097344.

The previous prime is 53651615519. The next prime is 53651615543. The reversal of 53651615520 is 2551615635.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55886620 + ... + 55887579.

It is an arithmetic number, because the mean of its divisors is an integer number (3520887300).

Almost surely, 2^53651615520 is an apocalyptic number.

It is an amenable number.

53651615520 is an abundant number, since it is smaller than the sum of its proper divisors (115350974880).

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

53651615520 is a wasteful number, since it uses less digits than its factorization.

53651615520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111774217 (or 111774209 counting only the distinct ones).

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

The spelling of 53651615520 in words is "fifty-three billion, six hundred fifty-one million, six hundred fifteen thousand, five hundred twenty".