128002637737461 has 16 divisors (see below), whose sum is σ = 180986343793344. Its totient is φ = 80192386063104.

The previous prime is 128002637737367. The next prime is 128002637737523. The reversal of 128002637737461 is 164737736200821.

It is not a de Polignac number, because 128002637737461 - 2⁷ = 128002637737333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128002637735461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1921755091 + ... + 1921821696.

It is an arithmetic number, because the mean of its divisors is an integer number (11311646487084).

Almost surely, 2^{128002637737461} is an apocalyptic number.

It is an amenable number.

128002637737461 is a deficient number, since it is larger than the sum of its proper divisors (52983706055883).

128002637737461 is a wasteful number, since it uses less digits than its factorization.

128002637737461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843577460.

The product of its (nonzero) digits is 14224896, while the sum is 57.

The spelling of 128002637737461 in words is "one hundred twenty-eight trillion, two billion, six hundred thirty-seven million, seven hundred thirty-seven thousand, four hundred sixty-one".