102048138438815 has 4 divisors (see below), whose sum is σ = 122457766126584. Its totient is φ = 81638510751048.

The previous prime is 102048138438811. The next prime is 102048138438853. The reversal of 102048138438815 is 518834831840201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102048138438815 - 2² = 102048138438811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102048138438811) 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, 10204813843877 + ... + 10204813843886.

It is an arithmetic number, because the mean of its divisors is an integer number (30614441531646).

Almost surely, 2^{102048138438815} is an apocalyptic number.

102048138438815 is a deficient number, since it is larger than the sum of its proper divisors (20409627687769).

102048138438815 is an equidigital number, since it uses as much as digits as its factorization.

102048138438815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20409627687768.

The product of its (nonzero) digits is 5898240, while the sum is 56.

The spelling of 102048138438815 in words is "one hundred two trillion, forty-eight billion, one hundred thirty-eight million, four hundred thirty-eight thousand, eight hundred fifteen".