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40044080081 = 125931806259
BaseRepresentation
bin100101010010110100…
…000010101111010001
310211100202000001000002
4211102310002233101
51124002241030311
630221311335345
72615221031105
oct452264025721
9124322001002
1040044080081
1115a89926065
127916821555
133a12247255
141d1c3a3905
1510957e293b
hex952d02bd1

40044080081 has 4 divisors (see below), whose sum is σ = 40075887600. Its totient is φ = 40012272564.

The previous prime is 40044080077. The next prime is 40044080107. The reversal of 40044080081 is 18008044004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40044080081 - 22 = 40044080077 is a prime.

It is a super-2 number, since 2×400440800812 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40044080051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15901871 + ... + 15904388.

It is an arithmetic number, because the mean of its divisors is an integer number (10018971900).

Almost surely, 240044080081 is an apocalyptic number.

It is an amenable number.

40044080081 is a deficient number, since it is larger than the sum of its proper divisors (31807519).

40044080081 is a wasteful number, since it uses less digits than its factorization.

40044080081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31807518.

The product of its (nonzero) digits is 4096, while the sum is 29.

The spelling of 40044080081 in words is "forty billion, forty-four million, eighty thousand, eighty-one".

Divisors: 1 1259 31806259 40044080081