48138508509 has 72 divisors (see below), whose sum is σ = 84863086560. Its totient is φ = 24054988608.

The previous prime is 48138508489. The next prime is 48138508519. The reversal of 48138508509 is 90580583184.

It is not a de Polignac number, because 48138508509 - 2⁵ = 48138508477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48138508519) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 654982 + ... + 724760.

It is an arithmetic number, because the mean of its divisors is an integer number (1178653980).

Almost surely, 2^48138508509 is an apocalyptic number.

48138508509 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

48138508509 is a deficient number, since it is larger than the sum of its proper divisors (36724578051).

48138508509 is a wasteful number, since it uses less digits than its factorization.

48138508509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69847 (or 69821 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 48138508509 in words is "forty-eight billion, one hundred thirty-eight million, five hundred eight thousand, five hundred nine".