102742342550 has 48 divisors (see below), whose sum is σ = 194061774192. Its totient is φ = 40462156800.

The previous prime is 102742342531. The next prime is 102742342559. The reversal of 102742342550 is 55243247201.

It is a self number, because there is not a number n which added to its sum of digits gives 102742342550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102742342559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2059502 + ... + 2108798.

It is an arithmetic number, because the mean of its divisors is an integer number (4042953629).

Almost surely, 2^102742342550 is an apocalyptic number.

102742342550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102742342550 is a deficient number, since it is larger than the sum of its proper divisors (91319431642).

102742342550 is a wasteful number, since it uses less digits than its factorization.

102742342550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49953 (or 49948 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

Adding to 102742342550 its reverse (55243247201), we get a palindrome (157985589751).

The spelling of 102742342550 in words is "one hundred two billion, seven hundred forty-two million, three hundred forty-two thousand, five hundred fifty".