53859915987 has 8 divisors (see below), whose sum is σ = 71814657936. Its totient is φ = 35905892352.

The previous prime is 53859915953. The next prime is 53859915997. The reversal of 53859915987 is 78951995835.

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

It is not a de Polignac number, because 53859915987 - 2⁷ = 53859915859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53859915947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30483 + ... + 329619.

It is an arithmetic number, because the mean of its divisors is an integer number (8976832242).

Almost surely, 2^53859915987 is an apocalyptic number.

53859915987 is a deficient number, since it is larger than the sum of its proper divisors (17954741949).

53859915987 is a wasteful number, since it uses less digits than its factorization.

53859915987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359157.

The product of its digits is 122472000, while the sum is 69.

The spelling of 53859915987 in words is "fifty-three billion, eight hundred fifty-nine million, nine hundred fifteen thousand, nine hundred eighty-seven".