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40015031665 = 572994738177
BaseRepresentation
bin100101010001000101…
…001110110101110001
310211021201100020001211
4211101011032311301
51123422322003130
630214353000121
72614416104620
oct452105166561
9124251306054
1040015031665
1115a74495604
127908b53041
133a0921643b
141d185a16b7
151092ea5a2a
hex95114ed71

40015031665 has 16 divisors (see below), whose sum is σ = 54881027712. Its totient is φ = 27437243904.

The previous prime is 40015031629. The next prime is 40015031671. The reversal of 40015031665 is 56613051004.

It is a de Polignac number, because none of the positive numbers 2k-40015031665 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029057 + ... + 1067233.

It is an arithmetic number, because the mean of its divisors is an integer number (3430064232).

Almost surely, 240015031665 is an apocalyptic number.

It is an amenable number.

40015031665 is a deficient number, since it is larger than the sum of its proper divisors (14865996047).

40015031665 is a wasteful number, since it uses less digits than its factorization.

40015031665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68136.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 40015031665 its reverse (56613051004), we get a palindrome (96628082669).

The spelling of 40015031665 in words is "forty billion, fifteen million, thirty-one thousand, six hundred sixty-five".

Divisors: 1 5 7 35 29947 38177 149735 190885 209629 267239 1048145 1336195 1143286619 5716433095 8003006333 40015031665