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64008025 = 523182591
BaseRepresentation
bin1111010000101…
…0111101011001
311110102221111121
43310022331121
5112341224100
610203525241
71405026214
oct364127531
9143387447
1064008025
11331491a4
1219529821
1310351393
14870277b
15594551a
hex3d0af59

64008025 has 12 divisors (see below), whose sum is σ = 81931264. Its totient is φ = 49554000.

The previous prime is 64008013. The next prime is 64008053. The reversal of 64008025 is 52080046.

It is not a de Polignac number, because 64008025 - 29 = 64007513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40521 + ... + 42070.

Almost surely, 264008025 is an apocalyptic number.

It is an amenable number.

64008025 is a deficient number, since it is larger than the sum of its proper divisors (17923239).

64008025 is a wasteful number, since it uses less digits than its factorization.

64008025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82632 (or 82627 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 64008025 is about 8000.5015467782. The cubic root of 64008025 is about 400.0167180513.

The spelling of 64008025 in words is "sixty-four million, eight thousand, twenty-five".

Divisors: 1 5 25 31 155 775 82591 412955 2064775 2560321 12801605 64008025