128420499974 has 16 divisors (see below), whose sum is σ = 209779385760. Its totient is φ = 58605032640.

The previous prime is 128420499967. The next prime is 128420500007. The reversal of 128420499974 is 479994024821.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27746282 + ... + 27750909.

It is an arithmetic number, because the mean of its divisors is an integer number (13111211610).

Almost surely, 2^128420499974 is an apocalyptic number.

128420499974 is a deficient number, since it is larger than the sum of its proper divisors (81358885786).

128420499974 is a wasteful number, since it uses less digits than its factorization.

128420499974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55497295.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 128420499974 in words is "one hundred twenty-eight billion, four hundred twenty million, four hundred ninety-nine thousand, nine hundred seventy-four".