128244036731 has 2 divisors, whose sum is σ = 128244036732. Its totient is φ = 128244036730.

The previous prime is 128244036649. The next prime is 128244036751. The reversal of 128244036731 is 137630442821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128244036731 - 2¹⁰ = 128244035707 is a prime.

It is a super-2 number, since 2×128244036731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128244036751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64122018365 + 64122018366.

It is an arithmetic number, because the mean of its divisors is an integer number (64122018366).

Almost surely, 2^128244036731 is an apocalyptic number.

128244036731 is a deficient number, since it is larger than the sum of its proper divisors (1).

128244036731 is an equidigital number, since it uses as much as digits as its factorization.

128244036731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 128244036731 in words is "one hundred twenty-eight billion, two hundred forty-four million, thirty-six thousand, seven hundred thirty-one".