31128863356050 has 48 divisors (see below), whose sum is σ = 77199949413792. Its totient is φ = 8300990627200.

The previous prime is 31128863356007. The next prime is 31128863356051. The reversal of 31128863356050 is 5065336882113.

It is a super-2 number, since 2×31128863356050² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31128863355984 and 31128863356002.

It is not an unprimeable number, because it can be changed into a prime (31128863356051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44855302 + ... + 45543998.

It is an arithmetic number, because the mean of its divisors is an integer number (1608332279454).

Almost surely, 2^{31128863356050} is an apocalyptic number.

31128863356050 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31128863356050 is an abundant number, since it is smaller than the sum of its proper divisors (46071086057742).

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

31128863356050 is a wasteful number, since it uses less digits than its factorization.

31128863356050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990043 (or 990038 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 31128863356050 in words is "thirty-one trillion, one hundred twenty-eight billion, eight hundred sixty-three million, three hundred fifty-six thousand, fifty".