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19680087775 = 5231114391759
BaseRepresentation
bin10010010101000001…
…100100111011011111
31212210112120001011211
4102111001210323133
5310301100302100
613012500325251
71264455662125
oct222501447337
955715501154
1019680087775
118389995257
1239929a3827
131b1832766a
14d49a0b915
157a2b271ba
hex495064edf

19680087775 has 24 divisors (see below), whose sum is σ = 24512716800. Its totient is φ = 15673624800.

The previous prime is 19680087761. The next prime is 19680087803. The reversal of 19680087775 is 57778008691.

It is not a de Polignac number, because 19680087775 - 29 = 19680087263 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11187346 + ... + 11189104.

It is an arithmetic number, because the mean of its divisors is an integer number (1021363200).

Almost surely, 219680087775 is an apocalyptic number.

19680087775 is a deficient number, since it is larger than the sum of its proper divisors (4832629025).

19680087775 is a wasteful number, since it uses less digits than its factorization.

19680087775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519 (or 3514 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 58.

The spelling of 19680087775 in words is "nineteen billion, six hundred eighty million, eighty-seven thousand, seven hundred seventy-five".

Divisors: 1 5 25 311 1439 1555 1759 7195 7775 8795 35975 43975 447529 547049 2237645 2531201 2735245 11188225 12656005 13676225 63280025 787203511 3936017555 19680087775