102720127550 has 12 divisors (see below), whose sum is σ = 191059437336. Its totient is φ = 41088051000.

The previous prime is 102720127507. The next prime is 102720127567. The reversal of 102720127550 is 55721027201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1027201226 + ... + 1027201325.

It is an arithmetic number, because the mean of its divisors is an integer number (15921619778).

Almost surely, 2^102720127550 is an apocalyptic number.

102720127550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102720127550 is a deficient number, since it is larger than the sum of its proper divisors (88339309786).

102720127550 is a wasteful number, since it uses less digits than its factorization.

102720127550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054402563 (or 2054402558 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The spelling of 102720127550 in words is "one hundred two billion, seven hundred twenty million, one hundred twenty-seven thousand, five hundred fifty".