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72081312301 = 197351969223
BaseRepresentation
bin100001100100001100…
…0011000101000101101
320220001110201001121101
41003020120120220231
52140110303443201
653040320403101
75131146021355
oct1031030305055
9226043631541
1072081312301
112862a026889
1211b77a76491
136a496c14ab
1436bb1d9b65
151d1d1d5d01
hex10c8618a2d

72081312301 has 8 divisors (see below), whose sum is σ = 76914451520. Its totient is φ = 67352111712.

The previous prime is 72081312299. The next prime is 72081312389. The reversal of 72081312301 is 10321318027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72081312301 - 21 = 72081312299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72081312301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72081312701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25983225 + ... + 25985998.

It is an arithmetic number, because the mean of its divisors is an integer number (9614306440).

Almost surely, 272081312301 is an apocalyptic number.

It is an amenable number.

72081312301 is a deficient number, since it is larger than the sum of its proper divisors (4833139219).

72081312301 is a wasteful number, since it uses less digits than its factorization.

72081312301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51969315.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 72081312301 in words is "seventy-two billion, eighty-one million, three hundred twelve thousand, three hundred one".

Divisors: 1 19 73 1387 51969223 987415237 3793753279 72081312301