102385615540 has 24 divisors (see below), whose sum is σ = 231549008040. Its totient is φ = 37803919488.

The previous prime is 102385615529. The next prime is 102385615559. The reversal of 102385615540 is 45516583201.

It can be written as a sum of positive squares in 4 ways, for example, as 3243758116 + 99141857424 = 56954^2 + 314868^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102385615493 and 102385615502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196895155 + ... + 196895674.

It is an arithmetic number, because the mean of its divisors is an integer number (9647875335).

Almost surely, 2^102385615540 is an apocalyptic number.

102385615540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102385615540 is an abundant number, since it is smaller than the sum of its proper divisors (129163392500).

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

102385615540 is a wasteful number, since it uses less digits than its factorization.

102385615540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393790851 (or 393790849 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 102385615540 in words is "one hundred two billion, three hundred eighty-five million, six hundred fifteen thousand, five hundred forty".