128770390540 has 48 divisors (see below), whose sum is σ = 295038041760. Its totient is φ = 46819758080.

The previous prime is 128770390537. The next prime is 128770390543. The reversal of 128770390540 is 45093077821.

It is an interprime number because it is at equal distance from previous prime (128770390537) and next prime (128770390543).

It is not an unprimeable number, because it can be changed into a prime (128770390543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986156 + ... + 2049964.

It is an arithmetic number, because the mean of its divisors is an integer number (6146625870).

Almost surely, 2^128770390540 is an apocalyptic number.

128770390540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128770390540 is an abundant number, since it is smaller than the sum of its proper divisors (166267651220).

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

128770390540 is a wasteful number, since it uses less digits than its factorization.

128770390540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73002 (or 73000 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 128770390540 in words is "one hundred twenty-eight billion, seven hundred seventy million, three hundred ninety thousand, five hundred forty".