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2581601394 = 231939122189
BaseRepresentation
bin1001100111100000…
…0001110001110010
320122220201221100110
42121320001301302
520241342221034
61104100402150
7120655151451
oct23170016162
96586657313
102581601394
111105279379
126006a6356
13321b006b8
141a6c12b98
15101998de9
hex99e01c72

2581601394 has 16 divisors (see below), whose sum is σ = 5163701760. Its totient is φ = 860450640.

The previous prime is 2581601377. The next prime is 2581601413. The reversal of 2581601394 is 4931061852.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105252 + ... + 127440.

It is an arithmetic number, because the mean of its divisors is an integer number (322731360).

Almost surely, 22581601394 is an apocalyptic number.

2581601394 is an abundant number, since it is smaller than the sum of its proper divisors (2582100366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2581601394 is a wasteful number, since it uses less digits than its factorization.

2581601394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41585.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 2581601394 is about 50809.4616582384. The cubic root of 2581601394 is about 1371.8176796352.

The spelling of 2581601394 in words is "two billion, five hundred eighty-one million, six hundred one thousand, three hundred ninety-four".

Divisors: 1 2 3 6 19391 22189 38782 44378 58173 66567 116346 133134 430266899 860533798 1290800697 2581601394