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152116615721 = 723538794393
BaseRepresentation
bin1000110110101011011…
…0110101101000101001
3112112122021020201210102
42031222312311220221
54443013323200341
6153514214555145
713663406620400
oct2155266655051
9475567221712
10152116615721
115956a955944
1225593668ab5
1311462c371b5
147510924637
153e54829c9b
hex236adb5a29

152116615721 has 12 divisors (see below), whose sum is σ = 177453282132. Its totient is φ = 130016291328.

The previous prime is 152116615691. The next prime is 152116615753. The reversal of 152116615721 is 127516611251.

It can be written as a sum of positive squares in 2 ways, for example, as 112519993600 + 39596622121 = 335440^2 + 198989^2 .

It is not a de Polignac number, because 152116615721 - 214 = 152116599337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (152116612721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4379900 + ... + 4414493.

It is an arithmetic number, because the mean of its divisors is an integer number (14787773511).

Almost surely, 2152116615721 is an apocalyptic number.

It is an amenable number.

152116615721 is a deficient number, since it is larger than the sum of its proper divisors (25336666411).

152116615721 is an equidigital number, since it uses as much as digits as its factorization.

152116615721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8794760 (or 8794753 counting only the distinct ones).

The product of its digits is 25200, while the sum is 38.

The spelling of 152116615721 in words is "one hundred fifty-two billion, one hundred sixteen million, six hundred fifteen thousand, seven hundred twenty-one".

Divisors: 1 7 49 353 2471 17297 8794393 61560751 430925257 3104420729 21730945103 152116615721