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2156854204545 = 35891615621127
BaseRepresentation
bin11111011000101110100…
…001110101100010000001
321122012012212201000212020
4133120232201311202001
5240314214134021140
64330502314552053
7311553600146655
oct37305641654201
97565185630766
102156854204545
11761797a73297
122aa01a138629
1312850cb60561
147656c688a65
153b1886c76d0
hex1f62e875881

2156854204545 has 16 divisors (see below), whose sum is σ = 3489741636480. Its totient is φ = 1137397272704.

The previous prime is 2156854204507. The next prime is 2156854204591. The reversal of 2156854204545 is 5454024586512.

It is a cyclic number.

It is not a de Polignac number, because 2156854204545 - 213 = 2156854196353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807809229 + ... + 807811898.

It is an arithmetic number, because the mean of its divisors is an integer number (218108852280).

Almost surely, 22156854204545 is an apocalyptic number.

It is an amenable number.

2156854204545 is a deficient number, since it is larger than the sum of its proper divisors (1332887431935).

2156854204545 is a wasteful number, since it uses less digits than its factorization.

2156854204545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615621224.

The product of its (nonzero) digits is 7680000, while the sum is 51.

The spelling of 2156854204545 in words is "two trillion, one hundred fifty-six billion, eight hundred fifty-four million, two hundred four thousand, five hundred forty-five".

Divisors: 1 3 5 15 89 267 445 1335 1615621127 4846863381 8078105635 24234316905 143790280303 431370840909 718951401515 2156854204545