42740782100081 has 16 divisors (see below), whose sum is σ = 46461761740800. Its totient is φ = 39081740533248.

The previous prime is 42740782100069. The next prime is 42740782100113. The reversal of 42740782100081 is 18000128704724.

It is a cyclic number.

It is not a de Polignac number, because 42740782100081 - 2²⁶ = 42740714991217 is a prime.

It is a super-3 number, since 3×42740782100081³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42740782106081) 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, 20320400 + ... + 22324878.

It is an arithmetic number, because the mean of its divisors is an integer number (2903860108800).

Almost surely, 2^{42740782100081} is an apocalyptic number.

It is an amenable number.

42740782100081 is a deficient number, since it is larger than the sum of its proper divisors (3720979640719).

42740782100081 is a wasteful number, since it uses less digits than its factorization.

42740782100081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019928.

The product of its (nonzero) digits is 200704, while the sum is 44.

The spelling of 42740782100081 in words is "forty-two trillion, seven hundred forty billion, seven hundred eighty-two million, one hundred thousand, eighty-one".